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1. Chiastolite.
2. A twinned crystal.
3. A dark spot or discoloration in a mineral.

[French, from Old French, lozenge, from Latin macula, mesh.]


(Minerals) another name for chiastolite, twin3
[C19: via French from Latin macula spot, stain]


(ˈmæk əl)

a twinned crystal.
[1720–30; < French]
References in periodicals archive ?
ITWw o kn oth ask Macle He said 28 and Gill " Fans were extremely shocked at the comment.
The score for the vocal piece Macle (1971), performed gleefully by the Ekmeles ensemble in Philadelphia and New York, offers blocks of information that four singers move through in sequence, sometimes containing notes, sometimes describing approaches to singing, and sometimes providing other cues, such as an instruction to sing a favorite pop song.
Macle et al., "Distinctive electrophysiological properties of pulmonary veins in patients with atrial fibrillation," Circulation, vol.
(1.) Macle L, Cairns J, Leblanc K, Tsang T, Skanes A, Cox JL, et al.
(5.) Weerasooriya R, Khairy P, Litalien J, Macle L, Hocini M, Sacher F, Lellouche N, Knecht S, Wright M, Nault I, Miyazaki S, Scavee C, Clementy J, Haissaguerre M, Jais P.
(2.) Wilber DJ, Pappone C, Neuzil P, De Paola A, Marchlinski F, Natale A, Macle L, Daoud EG, Calkins H, Hall B, Reddy V, Augello G, Reynolds MR, Vinekar C, Liu CY, Berry SM, Berry DA; ThermoCool AF Trial Investigators.
4-Voskar Macle : Il a tendance a ne pas courir souvent et vu la forte opposition en presence, il risque de ne pas pouvoir tenir la comparaison a ce niveau.