different between mammal vs synapsid

English

Etymology

Modern Latin Mammalia, coined 1758 by Linnaeus for the class of mammals, from neuter plural of Late Latin mammalis (“of the breast”), from Latin mamma (“breast”), perhaps cognate with mamma (mother).

Pronunciation

• (General American) IPA^(key): /?mæm?l/
• Hyphenation: mam?mal

Noun

mammal (plural mammals)

1. An animal of the class Mammalia, characterized by being warm-blooded, having hair and producing milk with which to feed its young.
2. (paleontology) A vertebrate with three bones in the inner ear and one in the jaw.

Hyponyms

• See also Thesaurus:mammal

Derived terms

Related terms

• mammarial
• mammary

Translations

English

Etymology

From translingual Synapsida, from syn- + Ancient Greek ???? (hapsís, “arch”).

Pronunciation

• (UK) IPA^(key): /s??naps?d/

Adjective

synapsid (comparative more synapsid, superlative most synapsid)

1. Pertaining to the class Synapsida, of animals which have an opening low in the skull roof behind each eye, leaving a bony arch beneath each.
   • 1999, Matt Ridley, Genome, Harper Perennial 2000, p. 26:

     We are synapsid tetrapods, a group of reptiles that almost went extinct 200 million years ago in competition with the better-designed dinosaurs.

Noun

synapsid (plural synapsids)

1. Any animal (including all mammals) of the class Synapsida.

Synonyms

• mammal-like reptile (dated)
• stem mammal