The Collaborative International Dictionary of English v.0.48:

Muscoid \Mus"coid\, a. [Muscus + -oid: cf. F. muscoide.] (Bot.)
   Mosslike; resembling moss.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Muscoid \Mus"coid\, n. (Bot.)
   A term formerly applied to any mosslike flowerless plant,
   with a distinct stem, and often with leaves, but without any
   vascular system.
   [1913 Webster]