1350-1400;Middle English < Late Latinsolidus (nummus) a solid (coin), a gold (coin)
[sol-i-duh s] /ˈsɒl ɪ dəs/
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.
(sŏl'ĭ-dəs) Pluralsolidi (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.