'non-thermochromic' originates from English, specifically by combining the prefix 'non-' with 'thermochromic', where 'non-' meant 'not', 'thermo-' (from Greek 'thermos') meant 'heat' and 'chromic' (from Greek 'chroma') meant 'color'.

'thermochromic' is a modern scientific formation from Greek elements 'thermo-' + 'chromic' coined in the Late 19th–20th century; 'non-' (an English negative prefix) was later prefixed to form 'non-thermochromic'.

Initially, 'thermochromic' referred specifically to materials that change color with temperature; adding 'non-' simply negates that sense, and 'non-thermochromic' has consistently meant 'not exhibiting thermochromism'.