singleton
noun /ˈsɪŋɡltən/
/ˈsɪŋɡltən/
- a single item of the kind that you are talking about
(所提及的)单项物,单个的人 - a person who is not married or in a romantic relationship
单身男子(或女子) - a person or an animal that is not a twin, etc.
(非孪生的)单生儿,单生幼畜
词源late 19th cent.: from single, on the pattern of simpleton.