(plural testes), 1704, from Latin testis "testicle," usually regarded as a special application of testis "witness" (see testament), presumably because it "bears witness to male virility" [Barnhart]. Stories that trace the use of the Latin word to some supposed swearing-in ceremony are modern and groundless.
Compare Greek parastatai "testicles," from parastates "one that stands by;" and French slang témoins, literally "witnesses." But Buck thinks Greek parastatai "testicles" has been wrongly associated with the legal sense of parastates "supporter, defender" and suggests instead parastatai in the sense of twin "supporting pillars, props of a mast," etc. Or it might be a euphemistic use of the word in the sense "comrades." OED, meanwhile, points to Walde's suggestion of a connection between testis and testa "pot, shell, etc." (see tete).
例文
1. The male gonads，the testis ，lie outside the abdomen within the scrotum.
雄畜の生殖腺である睾丸は、腹壁外の陰嚢内にある。dd>
2.Sometimes the testis fails to enter the scrotum.
睾丸が陰嚢に降下できないことがある。
3.The testis sacs communicate with the seminal vesicles.
精巣嚢は貯蔵精嚢につながっている。
4.A small rim of remaining normal testis appears at the far right.
右端は正常睾丸が残る少量のエッジである。
5.The result of micronucleus and testis chromomomomome assay were negative.