Answer: solidus

AnswerCrossword Clue
SOLIDUSGold coin of old Rome.
SOLIDUSSlant line (-), used in fractions, etc.
solidusgold coin of ancient Rome, introduced by Constantine and continued in the Byzantine Empire; bezant
solidus(in medieval Europe) a money of account equal to 12 denarii
solidusa coin of ancient Rome
solidusvirgule
solidus(on a graph of temperature versus composition) the curve connecting the temperatures at which a solid solution is in equilibrium with its vapor and with the liquid solution, and therefore connecting melting temperatures of solid solutions