1 [sol-i-duhs]
noun, plural solidi [sol-i-dahy] .
a gold coin of ancient Rome, introduced by Constantine and continued in the Byzantine Empire; bezant.
(in medieval Europe) a money of account equal to 12 denarii. Compare sol2.

1350–1400; Middle English < Late Latin solidus (nummus) a solid (coin), a gold (coin) Unabridged


2 [sol-i-duhs] .
noun Physical Chemistry.
(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.
Compare liquidus.

1900–05; < Latin: solid Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
solidus (ˈsɒlɪdəs)
n , pl -di
1.  a technical name for slash
2.  a gold coin of the Byzantine empire
[C14: from Late Latin solidus (nummus) a gold coin (from solidus solid); in Medieval Latin, solidus referred to a shilling and was indicated by a long s, which ultimately became the virgule]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

late 14c., pl. solidi, used of both English shilling and Roman gold coin, from L.L. solidus, an imperial Roman coin (worth about 25 denarii), from nummus solidus, lit. "solid coin" (see solid).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
solidus   (sŏl'ĭ-dəs)  Pronunciation Key 
Plural solidi (sŏl'ĭ-dī')
The maximum temperature at which all components of a mixture (such as an alloy) can be in a solid state. Above the solidus some or all of the mixture will be in a liquid state. See illustration at eutectic. Compare liquidus.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
The numerator and denominator of the fraction shall be diagonally arranged about the solidus.
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