S: (n) pest (any unwanted and destructive insect or other animal that attacks food or crops or livestock etc.) "he sprayed the garden to get rid of pests"; "many pests have developed resistance to the common pesticides"
S: (n) critter (a regional term for `creature' (especially for domestic animals))
S: (n) creepy-crawly (an animal that creeps or crawls (such as worms or spiders or insects))
S: (n) darter (a person or other animal that moves abruptly and rapidly) "squirrels are darters"
S: (n) peeper (an animal that makes short high-pitched sounds)
S: (n) homeotherm, homoiotherm, homotherm (an animal that has a body temperature that is relatively constant and independent of the environmental temperature)
S: (n) poikilotherm, ectotherm (an animal whose body temperature varies with the temperature of its surroundings; any animal except birds and mammals)
S: (n) range animal (any animal that lives and grazes in the grassy open land of western North America (especially horses, cattle, sheep))
S: (n) varmint, varment (any usually predatory wild animal considered undesirable; e.g., coyote)
S: (n) scavenger (any animal that feeds on refuse and other decaying organic matter)
S: (n) feeder (an animal that feeds on a particular source of food) "a bark feeder"; "a mud feeder"
S: (n) migrator (an animal (especially birds and fish) that travels between different habitats at particular times of the year)
S: (n) molter, moulter (an animal (especially birds and arthropods and reptiles) that periodically shed their outer layer (feathers or cuticle or skin or hair))
S: (n) pet (a domesticated animal kept for companionship or amusement)
S: (n) stayer (a person or other animal having powers of endurance or perseverance) "the horse that won the race is a good stayer"
S: (n) stunt (a creature (especially a whale) that has been prevented from attaining full growth)
S: (n) survivor (an animal that survives in spite of adversity) "only the fittest animals were survivors of the cold winters"
S: (n) mutant (an animal that has undergone mutation)
S: (n) herbivore (any animal that feeds chiefly on grass and other plants) "horses are herbivores"; "the sauropod dinosaurs were apparently herbivores"
S: (n) acrodont (an animal having teeth consolidated with the summit of the alveolar ridge without sockets)
S: (n) pleurodont (an animal having teeth fused with the inner surface of the alveolar ridge without sockets)
S: (n) zooplankton (animal constituent of plankton; mainly small crustaceans and fish larvae)
S: (n) embryo, conceptus, fertilized egg (an animal organism in the early stages of growth and differentiation that in higher forms merge into fetal stages but in lower forms terminate in commencement of larval life)
S: (n) chordate (any animal of the phylum Chordata having a notochord or spinal column)
S: (n) invertebrate (any animal lacking a backbone or notochord; the term is not used as a scientific classification)
S: (n) metazoan (any animal of the subkingdom Metazoa; all animals except protozoans and sponges)
S: (n) omnivore (an animal that feeds on both animal and vegetable substances)
S: (n) larva (the immature free-living form of most invertebrates and amphibians and fish which at hatching from the egg is fundamentally unlike its parent and must metamorphose)
S: (n) male, male person (a person who belongs to the sex that cannot have babies)
S: (n) Male (the capital of Maldives in the center of the islands)
Adjective
S: (adj) male (being the sex (of plant or animal) that produces gametes (spermatozoa) that perform the fertilizing function in generation) "a male infant"; "a male holly tree"