'musth' definitions:

Definition of 'musth'

From: WordNet
noun
An annual phase of heightened sexual excitement in the males of certain large mammals (especially elephants); is associated with discharge from a gland between the eye and ear; "the frenzied elephant was in musth"

Definition of 'musth'

From: GCIDE
  • must \must\, musth \musth\(m[u^]st), a. [Hind. mast intoxicated, ruttish, fr. Skr. matta, p.p. of mad to rejoice, intoxicate.] (Zool.) Being in a condition of dangerous frenzy, usually connected with sexual excitement; -- said of adult male elephants which become so at irregular intervals, typicaly due to increased testosterone levels. -- n. (a) The condition of frenzy. (b) An elephant in must. [Webster 1913 Suppl. +PJC]