mystacial /mɪsˈteɪʃəl/adjective 2noun 1forms 1 adjective2 •Having a fringe of hairs suggestive of a moustache. •Pertaining to the area around the vibrissae on either side of the muzzle of a mammal such as a rodent or cat.The mystacial pads are large and fleshy, extending beyond the nostrils. — 1993 noun1 •Any of the large rigid whiskers (vibrissae) that appear on the fleshy pads on either side of the muzzle of an animal such as a cat or rodent.During the third week, the mystacials and ulnarcarpals are the first to form. formsmystacials
