amphibamid
Any of several extinct temnospondyls, of the family †Amphibamidae.

amphibamids
plural of amphibamid

amphibamiform
Any amphibamid of the clade Amphibamiformes

amphibamiforms
plural of amphibamiform

amphicyonid
Any of the family †Amphicyonidae of extinct carnivorans; a beardog.

amphicyonids
plural of amphicyonid

amphidinolide
Any of a class of macrolides, isolated from marine dinoflagellates of the genus Amphidinium, that show antitumor activity.

amphidinolides
plural of amphidinolide

amphidomatacean
Any protist of the family Amphidomataceae

amphidomataceans
plural of amphidomatacean

amphilepidid
Any brittle star of the family Amphilepididae

amphilepidids
plural of amphilepidid

amphileptid
Any ciliate of the family Amphileptidae

amphileptids
plural of amphileptid

amphimorpho
A fictional open species of extraterrestrial shapeshifter, with a long mammalian body and ears, and four or six limbs.

amphimorphos
plural of amphimorpho.

amphisiellid
Any alveolate protozoan of the family Amphisiellidae

amphisiellids
plural of amphisiellid

amphistome
Any trematode of the genus Paramphistomum (previously Amphistoma)

amphistomes
plural of amphistome

amphiurid
Any brittle star in the family Amphiuridae.

amphiurids
plural of amphiurid

amphixenoses
plural of amphixenosis

amphixenosis
A zoonosis that can be passed from humans to other species as well as being passed from another species to a human.

amplexograptid
Any graptolite of the genus Amplexograptus.

ampullarid
Any of the family Ampullariidae of apple snails.

ampullarids
plural of ampullarid

amylobacteria
plural of amylobacterium

amylobacterium
A bacterium producing butyric fermentation, ascribed to the action of Clostridium butyricum.

amylovoran
A capsular exopolysaccharide present in the fire blight pathogen Erwinia amylovora

anabaenolysin
Any of a group of cytolytic lipopeptides present in cyanobacteria of the genus Anabaena.

anabaenolysins
plural of anabaenolysin

anacyclamide
Any of a group of prenylated cyanobactins in a cyanobacterium of the genus Anabaena.

anacyclamides
plural of anacyclamide

anaerolineacean
Any bacterium of the family Anaerolineaceae

anaerolineaceans
plural of anaerolineacean

anageneses
plural of anagenesis

anagenesis
The evolution of a new species by the large scale change in gene frequency so that the new species replaces the old rather than branching to produce an additional species.

anammoxosome
The organelle, in anammox bacteria, in which catabolism takes place

anammoxosomes
plural of anammoxosome

anancine
Any of the extinct genus Anancus of elephantoid proboscideans native to Afro-Eurasia.

anancines
plural of anancine

anchithere
Any of the genus †Anchitherium of extinct horses.

anchitheres
plural of anchithere

anditomin
A meroterpenoid derived from Aspergillus species.

androdioecy
A reproductive system found in species composed of a male population and a distinct hermaphrodite population.

androsporangia
plural of androsporangium

androsporangium
A sporangium for androspores.

anemonefish
Any of the clownfish, principally in the Amphiprion genus.

anemonefishes
plural of anemonefish

anemonin
An acrid toxic substance obtained from some species of anemone.

anguimorphid
Any anguid of the suborder Anguimorpha.

anguimorphids
plural of anguimorphid

anguinid
Any of the genus Anguina of nematodes.

anguinids
plural of anguinid

anhydrobiont
Any organism that lives in an environment with nearly no water

anhydrobionts
plural of anhydrobiont

anisembiid
Any webspinner in the family Anisembiidae.

anisembiids
plural of anisembiid

anisograptid
Any graptolite of the family †Anisograptidae.

anisolabidid
Any in the family Anisolabididae of earwigs.

anisolabidids
plural of anisolabidid

anisospore
A sexual spore in which the sexes differ in size.

anisospores
plural of anisospore

annidation
The adaptation of the various genotypes to different ecological niches, such as where a mutant form of a species is maintained in a population because it can flourish in a way that the parent organisms cannot.

annidations
plural of annidation

anomalinid
A foraminifer of the family Anomalinidae.

anomalinids
plural of anomalinid

anomopod
Any crustacean of the suborder Anomopoda.

anomopods
plural of anomopod

anomphalid
Any of the extinct gastropods in the family Anomphalidae.

anomphalids
plural of anomphalid

anophelism
infestation with mosquitos of the genus Anopheles.

ansalactam
Any of a group of ansamycin macrolides present in marine some bacteria

ansalactams
plural of ansalactam

antedonid
Any of the crinoids in the family Antedonidae.

antedonids
plural of antedonid

anteosaurid
Any of the therapsids in the family Anteosauridae.

anteosaurids
plural of anteosaurid

antheacherid
Any of the copepods in the family Antheacheridae.

antheacherids
plural of antheacherid

anthracoceratid
Any of the extinct ammonids in the family Anthracoceratidae.

anthracoceratids
plural of anthracoceratid

anthracomartid
Any of the extinct arachnids in the family Anthracomartidae.

anthracomartids
plural of anthracomartid

anthrolysin
A toxic cytolysin present in the bacterium Bacillus anthracis.

anthrolysins
plural of anthrolysin

anthropochore
A species that depends on anthropochory as a routine means of reproductive dispersal.
A population of a species in a region where it does not natively occur, established by anthropochorous events in the past.

anthropochores
plural of anthropochore

anthuroid
Any isopod of the superfamily Anthuroidea

anthuroids
plural of anthuroid

antispeciesism
An ethical stance which opposes the unjustified consideration or treatment of sentient individuals who are not classified as belonging to a certain species.

antispecism
Alternative form of antispeciesism.

antpecker
Any of the genus Parmoptila of tropical songbirds of Africa.

antpeckers
plural of antpecker

aphelench
Any of the genus Aphelenchus of nematodes.

aphelenchoidid
Any nematode of the superfamily Aphelenchoididea

aphelenchoidids
plural of aphelenchoidid

aphelenchs
plural of aphelench

aphidine
Any of the subfamily Aphidinae of aphids.

aphidines
plural of aphidine

aphidoid
Any aphid of the superfamily Aphidoidea.

aphidoids
plural of aphidoid

aphrophorid
Any spittlebug in the family Aphrophoridae.

aphrophorids
plural of aphrophorid

aphyllophoroid
Any fungus of the obsolete order Aphyllophorales.

aphyllophoroids
plural of aphyllophoroid

apistogrammine
Any cichlid of the genus Apistogramma

apistogrammines
plural of apistogrammine

aplanochytrid
Any marine protist of the family Aplanochytriidae

aplanochytrids
plural of aplanochytrid

aplanospore
An immobile spore that may nevertheless potentially grow flagella.

aplanospores
plural of aplanospore

aplocheiloid
Any killifish of the suborder Aplocheiloidei

aplocheiloids
plural of aplocheiloid

apoditrysian
Any micromoth of the clade Apoditrysia

apoditrysians
plural of apoditrysian

apolemiid
Any siphonophore of the family Apolemiidae

apolemiids
plural of apolemiid

apomorphies
plural of apomorphy

apomorphy
A derived characteristic of a clade. Any feature novel to a species and its descendants.

apostome
Any ciliate of the order Apostomatida

apostomes
plural of apostome

aposymbiont
An aposymbiotic symbiont

aposymbionts
plural of aposymbiont

arachnivore
Any organism that eats spiders

arachnivores
plural of arachnivore

arachnomorph
Any arthropod of the clade Arachnomorpha

arachnomorphs
plural of arachnomorph

arachnophage
Any organism that eats spiders.

arachnophages
plural of arachnophage

araphids
plural of araphid

araxoceratid
Any any of the extinct ammonites in the family Araxoceratidae.

araxoceratids
plural of araxoceratid

arcellacean
Any protist of the order Arcellinida

arcellaceans
plural of arcellacean

arcellinid
Any protozoan of the order Arcellinida

arcellinids
plural of arcellinid

archaellin
An acetylated tetrasaccharide present in some archaea

archaellins
plural of archaellin