solidus

 
Pronunciation: /ˈsɒlɪdəs/

noun (plural solidi /-dʌɪ/)

  • 2 (also solidus curve) Chemistry a curve in a graph of the temperature and composition of a mixture, below which the substance is entirely solid.
  • 3 historical a gold coin of the later Roman Empire.
    [from Latin solidus (nummus)]

Origin:

Latin, literally 'solid'