awn

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awn

see ARISTA (2).

awn

a long, sharp spine projecting from the coverings about a seed. They assist the seedhead in penetration of the skin and then migration through very large distances into all tissues, including even the canine intervertebral disk. They are common subcutaneous foreign bodies in sheep, where they appear to do no harm, and dogs where they commonly cause abscesses and some chronic, discharging fistulae. They are particularly troublesome in the nasal cavity, ears and eyes of dogs.