cosh
cosh1(Brit. informal)(英,非正式)noun- a thick heavy stick or bar used as a weapon
(用作武器的)短棍;短棒
verb- [with obj.]hit (someone) on the head with a cosh
(对准头部)棍击;棒击
语源- mid 19th cent.: of unknown origin
cosh2[kɒʃ, kɒˈseɪtʃ](Mathematics)(数)abbreviation for- hyperbolic cosine
双曲余弦
语源- from cos + -h for hyperbolic. Compare with coth
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