acnidosporidian
Any sporozoan of the subclass Acnidosporidia

acnidosporidians
plural of acnidosporidian

acoelomorph
Any plankton of the subphylum Acoelomorpha

acoelomorphs
plural of acoelomorph

acridivore
Any organism that eats grasshoppers and locusts

acridivores
plural of acridivore

acromoprotease
Synonym of achromopeptidase.

acrospore
A fungal spore produced at the tip of a specialized hypha.

acrospores
plural of acrospore

actiniscidian
Any dinoflagellate of the family Actiniscaceae.

actinobacilli
plural of actinobacillus

actinobacillus
Any bacterium of the genus Actinobacillus.

actinoceratid
Any of the extinct cephalopods in the family †Actinoceratidae.

actinoceratids
plural of actinoceratid

actinohivin
A lectin, that counters HIV, isolated from an actinomycete of the genus Longispora

actinolepid
Any of the extinct placoderms in the family Actinolepidae.

actinolepids
plural of actinolepid

actinomyces
Any bacterium (species) of the genus Actinomyces.

actinomycete
Any of various filamentous or rod-shaped bacteria, of the order Actinomycetales, that resemble fungi. Some actinomycetes are pathogens and some are sources of antibiotics.

actinomycetes
plural of actinomycete

actinomyxidian
Any parasitic protozoan of the order Actinomyxidia

actinomyxidians
plural of actinomyxidian

actinophryid
Any heliozoan of the order Actinophryida

actinophryids
plural of actinophryid

aegid
Any of the isopods in the family Aegidae.

aegids
plural of aegid

aegloid
Any crustacean of the superfamily Aegloidea

aegloids
plural of aegloid

aeolidiid
Any nudibranch of the family Aeolidiidae

aeolidiids
plural of aeolidiid

aeolothripid
Any of the thrips in the family Aeolothripidae.

aeolothripids
plural of aeolothripid

aequorean
Any pelagic hydrozoan of the genus Aequorea.

aequoreans
plural of aequorean

aerobacteriology
The study of airborne bacteria.

aerobe
Any organism (but especially a bacterium) that can tolerate the presence of oxygen, or that needs oxygen to survive.

aerobes
plural of aerobe

aerobia
Synonym of aerobium.

aerobiont
Any organism that needs air (oxygen) to survive

aerobionts
plural of aerobiont

aerobium
Synonym of aerobe.

aeromonad
Any bacterium of the genus Aeromonas.

aeromonads
plural of aeromonad

aetalionid
Any treehopper of the family Aetalionidae.

aetosaurian
Any aetosaur of the order †Aetosauria

afropithecine
Any hominoid of the family †Afropithecidae

afropithecines
plural of afropithecine

agamospecies
A group of organisms that reproduce asexually but have the characteristics of a species

agamospore
An asexual spore.

agamospores
plural of agamospore

agonistics
The range of activities associated with aggressive encounters between members of the same species, including threat, attack, appeasement, or retreat.

agribiont
Any organism that lives mainly in an agricultural environment

agribionts
plural of agribiont

agrichnion
A systematic burrow network designed to capture migrating meiofauna or perhaps even to culture bacteria.

agrobacteria
plural of agrobacterium

agrobacterium
A soil bacterium, of the genus Agrobacterium, which can fix nitrogen, and causes the formation of crown galls in plants.

agrobiont
Any organism that lives only in an agricultural environment

agrobionts
plural of agrobiont

akoub
Tumble thistle (Gundelia spp., especially species Gundelia tournefortii).

alabamium
A rejected name for astatine.

alauahio
Any of most of the species of genus Paroreomyza of Hawaiian honeycreepers.

albuliform
Any bonefish of the order Albuliformes

albuliforms
plural of albuliform

aldebaranium
A rejected name for ytterbium.

alepocephaliform
Any slickhead of the order Alepocephaliformes

alepocephaliforms
plural of alepocephaliform

algarrobilla
Astringent resinous husks and seeds of several species of leguminous trees or shrubs of South America, which are an article of commerce for their value in tanning and dyeing
Shrubs and trees that yield this product, especially
Shrubs and trees that yield this product, especially:

algarrobillas
plural of algarrobilla

alicyclobacilli
plural of alicyclobacillus

alicyclobacillus
Any bacterium of the genus Alicyclobacilli

alkalibiont
Any organism that lives in an alkaline environment

alkalibionts
plural of alkalibiont

allelocatalysis
The supposed mutual stimulation of the growth of similar bacteria

allmouth
Any of the order Lophiiformes of anglerfish, such as Lophius piscatorius.

allmouths
plural of allmouth

alloantigen
Any antigen, present in only some individuals of a species, that stimulates the production of antibodies in those that lack it; an isoantigen

alloantigens
plural of alloantigen

allocreadiid
Any trematode of the family Allocreadiidae

allocreadiids
plural of allocreadiid

allodaposuchian
Any eusuchian crocodylomorph of the genus Allodaposuchus

allodaposuchians
plural of allodaposuchian

allodesmine
Any of the genus †Allodesmus of extinct pinnipeds.

allodesmines
plural of allodesmine

alloform
A distinct form of something treated as a single kind or species.

alloforms
plural of alloform

allogromiid
Any foraminiferan of the order Allogromiida

allogromiids
plural of allogromiid

alloparasitoid
Any organism that is alloparasitic during part of its life cycle

alloparasitoids
plural of alloparasitoid

allopathogen
An allopathic pathogen

allopathogens
plural of allopathogen

allospecies
Any of the species that make up a superspecies
Any allogamous species

allotype
A designated paratype of a species (or lower-order taxon) that is the opposite sex of the holotype.
A genetically determined variant of the amino acid sequence of a protein.
An immunoglobulin allotype; the allele of the antibody chains found in an individual.

allotypes
plural of allotype

alosid
Any shad of the genus Alosa.

alosids
plural of alosid

alphacoronavirus
Any coronavirus of the genus Alphacoronavirus.

alphacoronaviruses
plural of alphacoronavirus

alphaendornavirus
Any endornavirus of the genus Alphaendornavirus

alphaendornaviruses
plural of alphaendornavirus

alphahypovirus
Any hypovirus of the genus Alphahypovirus

alphahypoviruses
plural of alphahypovirus

alphaletovirus
A letovirus of the genus Alphaletovirus

alphaletoviruses
plural of alphaletovirus

alphapartitivirus
Any partitivirus of the genus Alphapartitivirus

alphapartitiviruses
plural of alphapartitivirus

alphapolyomavirus
Any polyomavirus of the genus Alphapolyomavirus

alphaproteobacteria
plural of alphaproteobacterium

alphaproteobacterium
Any proteobacterium of the class Alphaproteobacteria

alsike
Trifolium hybridum, a species of clover with pinkish or white flowers.

alsikes
plural of alsike

alteromonad
Any bacterium of the genus Alteromonas.

alteromonads
plural of alteromonad

alveolinid
Any foraminifer in the family Alveolinidae.

alveolinids
plural of alveolinid

ambersnail
Any of the genus Oxyloma of air-breathing land snails.

ameboflagellate
Alternative form of amoeboflagellate.

ameboflagellates
plural of ameboflagellate

amerospore
Any dark or colourless spore that cannot be characterized as any other type

amerospores
plural of amerospore

ammoniid
Synonym of rotaliid.

ammoniids
plural of ammoniid

ammotrechid
Any solifugid in the family Ammotrechidae.

ammotrechids
plural of ammotrechid

amoebaflagellate
Misspelling of amoeboflagellate.

amoeboflagellate
Any small, colourless protist of the phylum Amoeboflagellata (now called Schizopyrenida)

amoeboflagellates
plural of amoeboflagellate

amoebozoon
Any organism of the phylum Amoebozoa

amoebozoons
plural of amoebozoon

amorphean
Any organism of the clade Amorphea.

amorpheans
plural of amorphean

ampelanol
A cytotoxic anthraquinone derivative, present in the fungal endophyte Ampelomyces

ampelography
The discipline within botany concerned with the taxonomy of cultivars in the grapevine genus, Vitis.

ampharetid
Any polychete in the family Ampharetidae.

ampharetids
plural of ampharetid