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