plastron - (zoology) the part of a turtle's shell forming its underside

pallium, mantle - (zoology) a protective layer of epidermis in mollusks or brachiopods that secretes a substance forming the shell

venous blood system, venation - (zoology) the system of venous blood vessels in an animal

biological science, biology - the science that studies living organisms

bugology, entomology - the branch of zoology that studies insects

ethology - the branch of zoology that studies the behavior of animals in their natural habitats

herpetology - the branch of zoology concerned with reptiles and amphibians

ichthyology - the branch of zoology that studies fishes

mammalogy - the branch of zoology that studies mammals

ornithology - the branch of zoology that studies birds

protozoology - the branch of zoology that studies protozoans

palaeozoology, paleozoology - the study of fossil animals

natural scientist, naturalist - a biologist knowledgeable about natural history (especially botany and zoology)

aestivation, estivation - (zoology) cessation or slowing of activity during the summer; especially slowing of metabolism in some animals during a hot or dry period

anterior - of or near the head end or toward the front plane of the body

posterior - at or near the hind end in quadrupeds or toward the spine in primates

vagile - having freedom to move about; "vagile aquatic animals"

caudate, caudated - having a tail or taillike appendage

acaudal, acaudate - lacking a tail or taillike appendage

metabolous, metabolic - undergoing metamorphosis

ametabolic, ametabolous - undergoing slight or no metamorphosis

univalve - used of mollusks, especially gastropods, as snails etc.

bivalve, bivalved - used of mollusks having two shells (as clams etc.)

vertebrate - having a backbone or spinal column; "fishes and amphibians and reptiles and birds and mammals are verbetrate animals"

invertebrate - lacking a backbone or spinal column; "worms are an example of invertebrate animals"

viviparous - producing living young (not eggs)

oviparous - egg-laying

ovoviviparous - producing living young from eggs that hatch within the body

warm-blooded - having warm blood (in animals whose body temperature is internally regulated)

cold-blooded - having cold blood (in animals whose body temperature is not internally regulated)

alular - pertaining to alulae

ambulacral - pertaining to the ambulacra of radial echinoderms

anguine - of or related to or resembling a snake

annelid, annelidan - relating to or belonging to or characteristic of any worms of the phylum Annelida

anserine - of or resembling a goose

anuran, batrachian, salientian - relating to frogs and toads

arachnidian, arachnoid, spiderlike, spiderly, spidery - relating to or resembling a member of the class Arachnida

araneidal, araneidan - relating to or resembling a spider

arthropodal, arthropodan, arthropodous - of or relating to invertebrates of the phylum Arthropoda

artiodactyl, artiodactylous, even-toed - of or relating to or belonging to mammals of the order Artiodactyla

avian - pertaining to or characteristic of birds

canine - of or relating to or characteristic of members of the family Canidae

carangid - of or relating to fish of the family Carangidae

filariid - of or relating to or belonging to the family Filariidae