abaxialabdomenabdominal aorta
abductionabductor muscleaberrations
abiogenesisablactationablepsia
abnormal flowerabnormal plantabnormalities
abomasumaboral zoneaborticide
abortifacientabortionabortive
abortive transductionabortusabrasion
abscessabscissionabsolute
absolute configurationabsolute humidityabsorbance
absorbifacientabsorbing surfaceabsorption
absorption spectrumabsorptive abilityabsorptivity
abstractabulomaniaabundance controls
abyssacardiaacaricide
acaridacaroidacaroid resin
acarologyaccelerationaccelerational force
acceleratoracceptorsaccessory bud
accessory cellaccessory heartaccessory nerve
accessory organsaccessory pigmentsaccipitrine
acclimationacclimation rateaccouchment
accrescentaccrescent calyxaccresent
accumulationaccumulator speciesacellular
acentric chromatidacentric chromosomesacervulus
acetabulumacetal bondsachene
achilless tendonachlamydeousachromatic
acid depositionacid drainageacid indigestion
acid rainacid-fast bacteriaacid-fast stain
acidemiaacidic dyeacidic soil
acidificationacidityacidophil cell
acidopholicacidosisacinus
acneacoelomateacoustic
acoustic emissionsacoustical materialsacoustico facialis nerve
acquatic saprophytesacquiredacquired immunity
acquired immunodeficiency diseasesacridologyacrimonious
acrocentricacrodontacrodont dentition
acromegalyacromion processacropathy
acropetalacropetal successionacropetally
acrosomal granuleacrospireactin filament
actin-binding proteinactinomorphyactinomycin D resistance
actinosteleaction potentialaction spectra
activated carriersactivated methyl cycleactivated sludge method
activating enzymesactivationactivation energy
activation of enzymeactivator proteinactivators
active acquired immunityactive dischargeactive immunity
active immunizationactive siteactive solar techniques
active transportacupunctureacute
acute abdomeninal painacute illnessacute infections
acute inflammationacute toxicityacyclic
acyl carrier proteinadactylousadams apple
adansonian taxonomyadaptableadaptation
adaptive immunityadaptive mutationadaptive radiation
adaxialadditionaddition mutation
additive allelesadditive effectadditive variance
adenalgiaadenineadenine nucleotide carrier
adenosine deaminase deficiencyadentive embryo initial cellsadephagia
adhereadherenceadhesion
adhesive forceadhesive organadipose
adipose celladipose tissueadjuvants
adnationadolescenceadoptive immunotherapy
adoxa typeadrenaladrenal cortex
adrenal glandadrenal medullaadsorption
adult animaladult birdadult worm
advanced (tertiary) treatmentadventitious budsadventitious roots
adventitive embryoadventive embryonyaeluropodous
aerationaerenchyma tissueaereole
aerial rootaeriferousaerobes
aerobic phaseaerobic respirationaerophagia
aerosol sprayaesthenopiaaesthetic value
aestivationaethaliaafferent
afferentafferent arotaafferent branchial vessel
afferent glomerular arteryafferent nerveafferent sensory neurons
affinityaffinity chromatographyaffinity labeling
aflatoxinaflatoxin food poisoningaflatoxins food spoilage
aflatoxins food-borne intoxicationafrican sleeping sicknessafter shalft
agamospermyagaragarose gel electrophoresis
age profilesage structuresagenda
agenesisageotropic growthagglutinated shell
agglutinated tubeagglutinationagglutinins
aggregate fruitaggregationaggregation hormone
agingaglossiaagnail
agricultureagriculture revolutionagrology
agronomyagrostologyagrosulocyte
air bladderair chamberair pollution
air pollution control act (1955)air poreair quality act (1967)
air quality standardair sacsair space
air-borne allergenair-borne diseaseair-borne toxics
airway hyperresponsivenessakinatealar pseudofossulae
alar septaalar spuriaalbatross
albinoalbino plantsalbirusion
albumenalbumen glandalbumen sac
albuminous seedalburnumalcohol
alcohol fermentationalcohol permeabilityalcoholic beverage
alcoholismaldolasealdosterone
alecithal eggsaleppo gallsaleurone
aleurone grainsaleurone tissuealga
algal bedalgal bloomalgal eutrophication
alginalgivorousalienist
aliferousaliform confluentaliform parenchyma
alimentary canalalimentary tractalimentary tract bacterial diseases
alimentary tract diseasesalimentary tract fungal diseasesalimentotherapy
alkali soilalkalinealkaline phosphatase
alkalinityallantoic acidallantoic artery
allantoic bloodallantoic fluidallantoic stock
allantoic veinallantoisallele
allelomorphallenuationallergen
allergenic foodallergic diseaseallergic rhinitis
allergic shockallergyalloantigen recognition
allogamyallograftalloimmune haematological disease
allopathallopathyallopatric speciation
allopolyploidallosomeallosteric effectors
allosteric enzymesallosteric inhibitionallosteric proteins
allosteric repressorsallotetraploidyallotyle
alluvialalluvial fanalluvial terrace
almondalpha helixalpha particles
alpha ring-formalpha sugaralpha taxonomy
alpha-linkagealpine vegetationalteration
alternate energy sourcesalternate hostalternate leaf
alternate pittingalternate radiialternation of generations
alternative namealternative splicingalveolar
alveolar ductalveolar teethalveolus
amberambulacral grooveambylopia
amensalismamentiferousamide bond
amino acidamino acid degradationamino acid sequence
amino groupamitosisamla
ammonificationamniotaamniotic fluid
amoebic dysenteryamoebicideamoebiosis
amoebocytesamoeboidamoeboid cell
amoeboid leucocyteamoeboid movementamphi neura
amphibiaamphibianamphibious
amphicribalamphidiploid hybridamphimixis
amphiphloeicamphiplexusamphitropous
amphivasalamphotericamphoteric compounds
amplexicalamplification capacityamplification of cdna ends
ampullaampullaamyelinated nerve fibre
amyloseanabasanabolism
anaemiaanaerobesanaerobic metabolism
anaerobic oxidationanaerobic phototrophsanaerobic respiration
anaestheticanal cercianal fin
anal fissureanal plateanal sac
anal shieldanal sphinceter muscleanal valve
analepticanalgesicanalogous
analogyanalysisanamniota
anaphaseanaphilusanastomosis
anatomyanatropous ovuleancestral
ancon breedandersen’s diseaseandroecium
androgenandrogen therapyandrogenesis
androgenic plantletsandrogenic plantsandrogeny
androgynophoreandrogynousandroid
androphoreandrosporeanemia
anemochoryanemometeranemophily
anesthesiaanesthesistaneuploidy
anginaangiosperm evolutionangiosperms
angle hornangler fishangora
angstrom unitanguinaanguine
angularangular collenchymaangular deviation
angular leaf spotanimal cellanimal cell culture
animal chamberanimal culeanimal electricity
animal fatanimal hormoneanimal house
animal modelanimal physiologyanimal plant association
animal poleanimal productsanimal rights
animal welfare act (1966)anionanion transport
anion-exchange proteinanisocyticanisodactyl
anisodontanisogamateanisogamy
anisomerousanisophyllousankle
ankle jointanletopeannealing temperature
annelidaannennuleannual climatic cycle
annual growth rateannual ringannuals
annular ringannular thickeningannulation
annulusanodontiaanodyne
anomalousanomalous secondary growthanomocytic
anophelesanorexiaanorexient
anoscopeanosmiaanoxia
anoxotrophic mutationsanoxygenic photosynthesisant bear
antacidantagonismanteater
antelopeantenatalantenna
antennal glandantennal hairantennal ocular plate
anterioranterior cardinal veinanterior cornea
anterior endanterior limiting sulcusanterior lobe
anterior mesenteric arteryanterior zygapophysisanther
anther cultureanther dehiscenceanther development
anther wallantheridial filamentantheridogen
antherozoidanthesisanthocyanidin ring
anthocyaninanthoecologyanthophagous
anthropicanthropoid apeanthropology
anthropophagyanti inflammatoryanti-inflammatory drugs
antiapical plateantibetalousantibiosis
antibioticantibiotic resistanceantibody
antibody-antigen complexantibody-conjugated toxinsanticancer drug
anticlinalanticoagulantanticodon
anticodon loopanticodon tripletantidiarhoea
antidiureticantidiuretic hormoneantifreeze poisoning
antifungal agentantifungal compoundantigen
antigenic determinantantigenic driftantigenic shift
antigenic variationantigenicityantihelminthic
antihistamineantimetabolitesantimicrobial agent
antimicrobial medicinesantimicrobial substancesantimicrobials
antiodontalgicantioxidantsantipetalous
antipodalantipodal embryoantipodal haustoria
antiquitiesantisepticantiserum
antispasmodicantitoxinsantivenin
antiversusantiviral compoundantiviral drug
antleranusanvil
aortaaortic ampullaaortic arch
aortic valveapeapertural fields
apetalousapetizerapex
aphanoplasmodiumaphidapholic zone
aphrodisiacapiaryapiary
apical budapical capapical cell
apical dominanceapical endapical growth
apical meristemapical notchapical papillae
apical plasma membraneapical plateapiculture
apitherapyaplanosporeaplysia
apocarpousapogamyapomixis
apomyxis embryoapoplast-symplast conceptapoplexy
apoproteinapopyleapospory
apothecaryapotheciumapotracheal parenchyma
appendageappendectomyappendicites
appendicular skeletonappendixapplication
applied embryologyapposition methodappositional growth
appresoriumappressed region (thylakoid)approach grafting
apteriaapterousaquaculture
aquariumaquatic animalaquatic biome
aquatic ecosystemaquatic farmingaquatic fungi
aquatic mammalsaquatic plantsaquatic respiration
aquatic vertebratesaqueous humorarabinose metabolism
arable landarachnidarachnoid
arachnoid matterarachnoid membranearal sea
araneiformarboraceousarboreal
arborescentarboriculturearchegonium
archenteronarchiannehlidaarchipelago
arctic national wildlife refugearea opacaarea vasculosa
area vittelinaarecanutarelolin
argasidalargininearomatic
arrow headarteiologyarterial cavity
arterial systemarteriosclerosisartery
arthritisarthropodaarthroscope
articulatearticulated laticiferartificial acquired immunity
artificial chromosomeartificial classificationartificial joint
artificial lightartificial seedartificial selection
artificial systemasafoetidaasbestos
ascarisascendingascending imbricate
ascent of sapascocarpascogenous hypha
ascogoniumascogonium hyphaeascorbic acid
ascosporeascusaseptate
asepticasexual propagationasexual reproduction
ashash analysisasphyxia
assayassembleassimilates
assimilationassimilatorassortment
asthmaastringentastrosphere
asymbioticasymmetricasymmetric reactions
asymmetricalasymmetry of membraneasynchronous muscles
atavismategmicateliosis
athletes footatlasatmosphere
atmospheric airatmospheric floraatmospheric impurities
atmospheric pollutantsatmospheric pressureatoll
atomic energyatomic mass numberatomic number
atomic structureatomic weightatoms
atrichousatrio-ventricular node (a.v. node)atrio-ventricular valves
atriodactylaatrophyattar
attenuated strainsattenuationaudible range
audiologyauditoryauditory aperture
auditory labyrinthauditory nerveauditory organ
auditory placodeauditory vesicleaural
auriculateautecologyauto antibodies
auto digestionauto immune diseaseauto immune response
auto inducerautoantibodiesautocatalytic activation
autochoryautoclavesautoclaving
autoeciousautogamyautograft
autoimmunityautonmous nervous systemautonomy
autophagyautoploidyautopolyploid
autopsyautoradiogramautoradiography
autoregulationautosomal heridityautotherapy
autotomyautotrophicautotrophs
autumn woodauxiliary cellauxin
auxin transportauxocardiaauxotrophic bacteria
auxotrophsavesaviary
avicolousavicultureavirulence
avirulentaxialaxial filament
axial ridgeaxial skeletonaxile
axile placentationaxillary budsaxis
axonaxopodium