antler

n. horn of animals in the deer family

Antlers are the large and complex horn-like appendages of male deer, consisting of bony outgrowths from the head with no covering of keratin as is found in true horns. Each antler grows from an attachment point on the skull called a pedicle. While an antler is growing it is covered with highly vascular skin called velvet, which supplies oxygen and nutrients to the growing bone; once the antler has achieved its proper size, the velvet is lost and the antler's bone dies. This dead bone structure is the mature antler. Antlers shed after each mating season.
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Antler single-tined or branched horny outgrowths from the frontal bones of male deer. Reindeer and caribou females also have horns. [more]Antler - Community and Resources

Noun
1. deciduous horn of a member of the deer family
(hypernym) horn
(part-holonym) deer, cervid

(n.)
The entire horn, or any branch of the horn, of a cervine animal, as of a stag.