Entry 2 senses · 2 variants Webster, 1913 Muscoid · Mus·coid · IPA a. n. 01 a. Mosslike; resembling moss. 1. Mosslike; resembling moss.(Bot.) 02 n. A term formerly applied to any mosslike flowerless plant, with a distinct stem, and often with leaves, but without any vascular system. 1. A term formerly applied to any mosslike flowerless plant, with a distinct stem, and often with leaves, but without any vascular system.(Bot.)