Definition - An archaic name for to-infinitives, such as to show and to eat.

Etymology -
The term derives from the Late Latin supinum verbum, supine verb (from the Latin supinus, turned or thrown backwards). It was perhaps so called because, even though it has a noun case ending, it "falls back" on the verb.

Oxford English Dictionary -
Its first citation as an English grammatical term is from 1721:
"Grammarians, … meer Traders in Gerunds and Retailers of Supines."
(Prior Dial. Dead, Chas. & Cl. (1907) 216)

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