[ noun ] (zoology) any of various long-tailed rodents similar to but larger than a mouse
Used in print(Richard F. McLaughlin, et al., "A study of the...)
Verloop ( ' 48 ; ' 49 ) found these shunts in the human_being but was unable to find them in rats .
Ellis , Grindlay and Edwards ( ' 52 ) also were unable to find them in rats .(Jacob Robbins et al., "The thyroid-stimulating...)
There is some reason to think that thyroglobulin synthesis may proceed independently of iodination , for in certain transplantable tumours of the rat thyroid containing essentially no iodinated thyroglobulin , a protein that appears to be thyroglobulin has been observed in ultracentrifuge experiments ( Wolff , Robbins and Rall , 1959 ) .(E. Gellhorn, "Prolegomena to a theory of the emotions"...)
But even in relatively primitive laboratory animals such_as the rat , sex_activity closely identified with the hypothalamus and the visceral_brain is enhanced by the neocortex .
[ verb ] catch rats, esp. with dogs
[ verb ] give (hair) the appearance of being fuller by using a rat
[ noun ] a person who is deemed to be despicable or contemptible
"only a rotter would do that" "kill the rat" "throw the bum out" "you cowardly little pukes!" "the British call a contemptible person a `git'"