recumbent (adj.) Look up recumbent at Dictionary.com
1640s (implied in recumbency), from Latin recumbentem (nominative recumbens), present participle of recumbere "to recline," from re- "back" (see re-) + -cumbere "to lie down," related to cubare "be lying" (see cubicle). A verb, recumb, has been attempted in English occasionally since 1670s.