Encaustic \En*caus"tic\, a. [L. encausticus, Gr. ?, fr. ? to burn in; ? in + ? 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.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Encaustic \En*caus"tic\, n. [L. encaustica, Gr. ? (sc. ?): 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.

Source: Webster's Revised Unabridged Dictionary (1913)