- Monoplacophora
- Monoplacophora /mon-ō-pla-kofˈə-rə/plural nounA very primitive limpet-like class of molluscs, believed, until the discovery (1952) of the living Neopilina off the W coast of Mexico, to have been extinct since early Silurian timesORIGIN: Gr monos single, alone, plax, plakos plate, and phoros bearing, from the single piece of shell
Useful english dictionary. 2012.