Definition of vibrissa
1a : any of the stiff hairs that are located on the face and especially about the snout of many mammals and typically serve as tactile organs also : a similar stiff tactile hair growing elsewhere on some mammals (as in a small tuft at the wrist)
b : any of the coarse hairs growing within the nostrils of humans that serve to impede the inhalation of particulate matter
2 : one of the bristly feathers near the mouth of many and especially insectivorous birds that may help to prevent the escape of insects
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