thi-

¹

1. variant of thio- before a vowel:

   thiazine.

THI

²

or T.H.I.

abbreviation for

, Meteorology.

1. temperature-humidity index ( def ).

thi-

¹

combining_form

1. See thio-
   a variant of thio-

THI

²

abbreviation for

1. temperature-humidity index