noun
testosterone
teh-STO-stuh-rohn
noun
1
A hormone, produced mainly in the testes, that drives male physical development and sex drive.
"Testosterone levels naturally decline with age."
2
Aggressive, macho, or overconfident behaviour, used loosely and often humorously.
"The locker room was full of testosterone before the big game."
How to Use Testosterone
Learner’s notesIn plain EnglishThe main male sex hormone, or informally, a shorthand for macho, aggressive energy.
Common pairings
testosterone levels
high on testosterone
testosterone-fuelled
Word Forms
testosterones plural
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Etymology
A blend of "testis" (the source gland), the connecting vowel "-o-", and "-sterone", a suffix used for steroid hormones — the same family that gives us "cholesterol".