Webster's Revised Unabridged Dictionary · 1913

Accumbent

Accumbent (-bent) , adjective

1.
Leaning or reclining, as the ancients did at their meals.
The Roman... accumbent posture in eating. — Arbuthnot
2.
(Botany) Lying against anything, as one part of a leaf against another leaf. — Gray
Accumbent cotyledons have their edges placed against the caulicle. — Eaton

Accumbent , noun

One who reclines at table.