vibrissa Definition

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)

any of the coarse hairs growing within the nostrils of humans that serve to impede the inhalation of particulate matter

one of the bristly feathers near the mouth of many and especially insectivorous birds that may help to prevent the escape of insects