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Wiktionary
bulbourethral gland

n. An exocrine gland which secretes a clear fluid known as pre-ejaculate or Cowper's fluid (colloquially known as “pre-cum”) which is generated upon sexual arousal.

WordNet
bulbourethral gland

n. either of two glands that discharge a component of seminal fluid into the urethra; homologous to Bartholin's gland in the female [syn: Cowper's gland]

Wikipedia
Bulbourethral gland

A bulbourethral gland, also called a Cowper gland for English anatomist William Cowper, is one of two small exocrine glands in the reproductive system of many male mammals (of all domesticated animals, they are only absent in the dog). They are homologous to Bartholin's glands in females.