名詞 ketone:

1. any of a class of organic compounds having a carbonyl group linked to a carbon atom in each of two hydrocarbon radicals

ke.tone

n.（名詞）
Any of a class of organic compounds having a carbonyl group linked to a carbon atom in each of two hydrocarbon radicals and having the general formula R(CO)R., where R may be the same as R..
甲酮：有機化合物的一類，在每兩個烴原子團(tuán)中有一組羰基與一個碳原子相連，通常分子式為R(CO)R`，其中R和R`可能相同

來源：
German Keton
德語 Keton
short for Aketon [acetone]
Aketon的簡寫 [丙酮]
Latin acôtum [vinegar] * see acetum
拉丁語 acôtum [醋] *參見 acetum
-on [n. suff.] alteration of -en from Greek -ônô
-on [名詞后綴] -en的變化 源自 希臘語 -ônô

【引伸】
keton.ic