meaning of doublet
Definition of DOUBLET. 1. : a man's close-fitting jacket worn in Europe especially during the Renaissance.edical Definition of DOUBLET. 1. : something consisting of two identical or similar parts: as a: a lens consisting of two components b: a spectrum line having two close components. 2. : a set of two identical or similar things; especially: one of nine pairs of microtubules found in cilia and flagella.