trochus
Definition of trochus
1a capitalized : a genus of chiefly Old World tropical marine gastropods (family Trochidae) with beautifully nacreous bluntly conical shells including a large Indo-Pacific species (T. niloticus) extensively used in making buttons and ornamental objects b plural -es : top shell
2 plural trochi \-ōˌkī\ or trochuses : the inner preoral band of cilia of a trochal disc; broadly : trochal disc
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Origin and Etymology of trochus
New Latin, from Latin, wheel, iron hoop, from Greek trochos wheel — more at troch-
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