Definition of testicle in English:
testicle
nounˈtɛstɪk(ə)lˈtɛstək(ə)l
Either of the two oval organs that produce sperm in men and other male mammals, enclosed in the scrotum behind the penis.
Also called testis
Synonyms
gonads
North American informal cojones
vulgar slang balls, knackers, nuts, rocks
British vulgar slang bollocks, goolies
Origin
Late Middle English: from Latin testiculus, diminutive of testis 'a witness' (i.e. to virility).
The ancient Romans felt that a man's testicles testified that he was male. They formed the word testiculus from Latin testis ‘witness’, the source also of attest (late 16th century); detest (Late Middle English) which originally meant to denounce; protest (Late Middle English); testify (Late Middle English); and intestate (Late Middle English) ‘without a witnessed will’. The testicles were the ‘witnesses’ of the man's virility.
Definition of testicle in US English:
testicle
nounˈtestək(ə)lˈtɛstək(ə)l
Either of the two oval organs that produce sperm in men and other male mammals, enclosed in the scrotum behind the penis.
Also called testis
Origin
Late Middle English: from Latin testiculus, diminutive of testis ‘a witness’ (i.e. to virility).