monoptygma

[Pref. mono-, and Gr.ptygma anything folded, a fold; pty ō =to fold, to double up.] Zool .: A genus of holostomatous proso branchiate gasteropods, family Pyramid ell ide (q. v.). The shells are beautiful and delicate. The animal has short tentacles, with the eyes at their inner bases, rudimentary tongue, and elongated, narrow foot. Twelve species are known. mon-o-py-re-nous, a . [Pref. mono- ; Gr. pyrën =a stone or kernel, and Eng. suff. -ous .] Bot.: Having but a single stone or kernel. mon-or-găn-ic, a. [Pref. mon-, and English organic (q. v.).] Belonging to or affecting one organ or set of organs.