tachetic

tachetic

adjective
(1) Maculated, spotted. 
(2) Marked by bluish or brownish spots.

Tachetic is not used in the working in medical parlance.

ta·chet·ic

(tă-ket'ik)
Marked by bluish or brownish spots.
[Fr. tache, spot]

tachetic

(tăk-ĕt′ĭk) [Fr. tache, spot]
Marked by purple or reddish-blue patches (taches).