[1] : The Collaborative International Dictionary of English v.0.48

accumbent \accum"bent\ -bent, a.
   1. leaning or reclining, as the ancients did at their meals.
      1913 webster

            the roman . . . accumbent posture in eating.
                                                  --arbuthnot.
      1913 webster

   2. bot. lying against anything, as one part of a leaf
      against another leaf. --gray.
      1913 webster

            accumbent cotyledons have their edges placed against
            the caulicle.                         --eaton.
      1913 webster

[2] : The Collaborative International Dictionary of English v.0.48

accumbent \accum"bent\, n.
   one who reclines at table.
   1913 webster

[3] : WordNet (r) 2.0

accumbent
     adj : lying down; in a position of comfort or rest syn: decumbent,
            recumbent, reclining
see also:
decumbent recumbent reclining 

Accumbent >> A Words
Accumbent, definition of term: Accumbent
accumbent_pag1.html