Webster’s Revised Unabridged Dictionary · 1913
Macle
Ma′cle (măk′'l), n. [L. macula a spot: cf. F. macle. Cf. Mackle, Mascle.] (Min.) (a) Chiastolite; — so called from the tessellated appearance of a cross section. See Chiastolite. (b) A crystal having a similar tessellated appearance. (c) A twin crystal.