1: leaning or reclining especially at meals
//the Roman accumbent posture in eating
2botany : lying against something
—used chiefly of cotyledons having their edges folded against the hypocotyl (as in many crucifers) — compare conduplicate, incumbent
3zoology : closely applied to a surface (as of the wing scales of certain insects)
First Known Use of accumbent
1680, in the meaning defined at sense 2
History and Etymology for accumbent
Latin accumbent-, accumbens, present participle of accumbere to lie down, recline at table, from ad- + -cumbere to lie down (akin to cubare to lie down)