- a bony support in the penis of certain mammals, esp the carnivores
C20: New Latin, from Latin: stick, staff
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
Examples from the Web for baculum
The baculum in Glaucomys is the most distinctive of that of any American sciurid.
The base of the baculum is broad but not so broad as in most species of Spermophilus.
It should be noted that not all species can be keyed out on the basis of the baculum.
The baculum does not, however, suddenly reach its maximum maturity.
The baculum in Microtus ochrogaster—orientation and variation with age.