singleton
/ˈsɪŋ.ɡ(ə)l.tən/ noun C1- A playing card that is the only one of its suit in a hand, especially at bridge.
- A hand containing only one card of a certain suit.
- A single object, especially one of a group.
- A class that may not be instantiated more than once, i.e. that implements the singleton design pattern.
- A set with exactly one element.
- A child or animal that is born singly, not as a twin or other multiple birth. · singleton preterm birth
- A person without a romantic partner.
- A person without a dissociative identity.
Plural singletons
From the library
“Put the pearl in the safe, Watson,” said he, “and get out the papers of the Conk-Singleton forgery case.
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