SINCE 1828
trochus
noun
tro·chus
| \ ˈtrōkəs\
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
2
plural trochi\ -ōˌkī\
or trochuses
: the inner preoral band of cilia of a trochal disc
broadly
: trochal disc
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