D defs.my
Entry 1 sense Webster, 1913

Isotheral

· I·soth·er·al · IPA
01 a. Having the nature of an isothere; indicating the distribution of temperature by means of an isothere; as, an isotheral chart or line.
  1. 1.
    Having the nature of an isothere; indicating the distribution of temperature by means of an isothere; as, an isotheral chart or line.