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Webster 1913 Edition
Procumbent
Pro-cum′bent
,Adj.
 [L. 
procumbens
, -entis
, p. pr. of procumbere 
to fall, bend, or lean forward; pro 
forward + cumbere 
(in comp.), akin to cubare 
to lie down: cf. F. procombant
. Cf. Incumbent
.] 1. 
Lying down, or on the face; prone. 
“ Procumbent each obeyed.” Cowper.
 2. 
(Bot.) 
Lying on the ground, but without putting forth roots; trailing; prostrate; 
as, a 
. procumbent 
stemWebster 1828 Edition
Procumbent
PROCUM'BENT
,Adj.
 1.
  In botany, trailing; prostrate; unable to support itself, and therefore lying on the ground, but without putting forth roots; as a procumbent stem.