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Definition of Hairpin
1. Noun. A double pronged pin used to hold women's hair in place.
Definition of Hairpin
1. n. A pin, usually forked, or of bent wire, for fastening the hair in place, -- used by women.
Definition of Hairpin
1. Adjective. Characterized by an abrupt or extreme bend; shaped like a hairpin. ¹
2. Noun. A pin or fastener for the hair. ¹
¹ Source: wiktionary.com
Definition of Hairpin
1. a hair fastener [n -S]
Medical Definition of Hairpin
1. The structure formed by a polynucleic acid by base-pairing between neighboring complementary sequences of a single strand of either DNA or RNA. (05 Mar 2000)