- resembling a wheel.
Origin of trochal
1835–45; < Greek troch(ós) wheel + -al1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for trochal
Historical Examples of trochal
On the sides of the ventral depression are two ridges which form the lateral boundaries of the trochal disc.
At a later period the lateral ridges of the trochal disc meet dorsally and so enclose the proral lobe.
- zoology shaped like a wheelthe trochal disc of a rotifer
Word Origin for trochal
C19: from Greek trokhos wheel
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012