rut(redirected from in a rut)
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1. A regularly recurring condition of fertility during which breeding occurs in certain mammals, especially deer and various other ungulates: a buck in rut.
2. The period during which this condition occurs.
intr.v. rutted, rutting, ruts
To be in rut.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
rutthe period of maximum testicular activity in male mammals (compare OESTRUS CYCLE), particularly applied to the period of sexual activity in deer.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005