Definition of solidi:
(n) :
(typography) Synonym of slash ⟨/⟩, originally (UK) in its use as the shilling mark and now its formal designation by the ISO and Unicode.
(n) :
(typography) The division line between the numerator and the denominator of a fraction, whether horizontal or oblique.
(n) :
A Roman ~23k gold coin introduced by Diocletian in AD 301 and called by that name, but reissued at a slightly lower weight by Constantine I.
(n) :
Its successor Byzantine coins, from the eleventh century onward of progressively debased weight and purity.
(n) :
(chemistry, physics) The line in a phase diagram marking the temperatures and pressures below which a given substance is a stable solid.
(n) :
(historical) Various medieval and early modern coins or units of account, particularly: