Meaning

noun a gold coin of the Byzantine Empire; widely circulated in Europe in the Middle Ages

noun a punctuation mark (/) used to separate related items of information

originFrom Middle English solidus, from classical Latin solidus (“solid”), see below. Doublet of sol, sold, soldo, solid, sou, and xu. In numismatic and weight senses, via medieval Latin solidus (“various coins”), from Late Latin solidus (“a gold coin of the Roman Empire”). In chemical sense, via German Solidus, coined by H.W.B. Roozeboom in his 1899 Zeitschrift für Physikalische Chemie, Stöchiometrie,…

Etymology from Wiktionary, CC BY-SA 3.0