Mid 17th century; earliest use found in Robert Herrick (bap. 1591, d. 1674), poet. From niple, variant of nipple + -et. In later use perhaps independently from nip + -let.
Definition of niplet in US English:
niplet
nounˈnɪplɪt
rare
A nipple.
Origin
Mid 17th century; earliest use found in Robert Herrick (bap. 1591, d. 1674), poet. From niple, variant of nipple + -et. In later use perhaps independently from nip + -let.