tempera
Refers to the painting medium or technique using egg yolk or similar binder, as well as the paint itself.
from Italian
中世のイコンはテンペラで描かれている。
Medieval icons are painted in tempera.
テンペラ
He painted this portrait using tempera.
Tempera paint dries quickly.
テンペラ (the painting medium) and 天ぷら (deep-fried food) sound almost identical in Japanese but are completely unrelated in meaning.
tempera painting
Borrowed from Italian 'tempera', referring to a painting technique using a water-soluble binder such as egg yolk.