doublet

n. two different words in the same language that come from the same original word.

n. one of two or more words in a language that share a common etymological ancestor but have diverged in form and meaning.

“'Shirt' and 'skirt' are a doublet because they both come from the same old word.”

“The English language is rich in etymological doublets, such as 'fragile' and 'frail', which entered the lexicon via different routes from the same Latin root.”

Technical · Academic

n. a short, tight jacket worn by men in Europe between the 1400s and 1600s.

n. a man's close-fitting, padded jacket, often with detachable sleeves, characteristic of European fashion from the late Middle Ages to the mid-17th century.

“The actor wore a velvet doublet for his role in the Shakespeare play.”

“The museum's textile collection includes a rare silk doublet from the Elizabethan era, remarkably preserved with its original silver embroidery.”

Archaic · Literary

n. a fake jewel made by joining two pieces of glass or stone together.

n. a counterfeit or assembled gemstone consisting of two layers, typically a thin slice of genuine stone glued to a glass or synthetic base.

“The ring looked like a real emerald, but it was actually a clever doublet.”

“Jewellers must be careful to distinguish between solid opals and doublets, as the latter are significantly less valuable due to their composite nature.”

Technical

n. a pair of lenses used together in a microscope or camera to make the image clearer.

n. an arrangement of two lenses, often made of different types of glass, designed to reduce optical errors like chromatic aberration.

“The microscope uses a doublet to help the scientist see the tiny cells clearly.”

“By using an achromatic doublet, the telescope designer was able to eliminate the purple fringing that often plagues cheaper optical systems.”

Technical