- 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
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
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