| caryatid | (noun) a supporting column carved in the shape of a person | - |
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| cathartid | (noun) large birds of prey superficially similar to Old World vultures | Synonyms: New World vulture |
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| chromatid | (noun) one of two identical strands into which a chromosome splits during mitosis | - |
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| dicamptodontid | (noun) salamanders found near cold streams throughout the year | Synonyms: dicamptodon |
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| hydatid | (noun) cyst filled with liquid; forms as a result of infestation by tapeworm larvae (as in echinococcosis) | - |
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| lacertid | (noun) Old World terrestrial lizard | Synonyms: lacertid lizard |
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| mantid | (noun) predacious long-bodied large-eyed insect of warm regions; rests with forelimbs raised as in prayer | Synonyms: mantis |
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| mylodontid | (noun) a variety of extinct edentate | - |
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| neritid | (noun) operculate seasnail of coastal waters with a short spiral shell | Synonyms: neritid gastropod |
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| ootid | (noun) mature ovum after penetration by sperm but before the formation of a zygote | - |
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| plastid | (noun) any of various small particles in the cytoplasm of the cells of plants and some animals containing pigments or starch or oil or protein | - |
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| sarcoptid | (noun) whitish mites that attack the skin of humans and other animals | Synonyms: itch mite |
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| spermatid | (noun) an immature gamete produced by a spermatocyte; develops into a spermatozoon | - |
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