procumbent
adjective
pro·cum·bent prō-ˈkəm-bənt 
1
: being or having stems that trail along the ground without rooting
2
: lying face down
Word History
Etymology
Latin procumbent-, procumbens, present participle of procumbere to fall or lean forward, from pro- forward + -cumbere to lie down
First Known Use
1668, in the meaning defined at sense 1
Medical Definition
procumbent
adjective
pro·cum·bent (ˈ)prō-ˈkəm-bənt
: a slanting forward
procumbent maxillary incisors