Webster’s Revised Unabridged Dictionary · 1913
Encaustic
En·caus′tic (ĕn·ka̤s′tĭk), a. [L. encausticus, Gr. ἐγκαυστικός, fr. ἐγκαίειν to burn in; ἐν in + καίειν to burn: cf. F. encaustique. See Caustic, and cf. Ink.] (Fine Arts) Prepared by means of heat; burned in.
Encaustic painting (Fine Arts), painting by means of wax with which the colors are combined, and which is afterwards fused with hot irons, thus fixing the colors. — Encaustic tile (Fine Arts), an earthenware tile which has a decorative pattern and is not wholly of one color.
En·caus′tic, n. [L. encaustica, Gr. ἐγκαυστική (sc. τέχνη): cf. F. encaustique. See Encaustic, a.] The method of painting in heated wax, or in any way where heat is used to fix the colors.