Obs. Also 6 calcar, 7 calcour. [f. CALK v.1 + -ER1.] A calculator of nativities, etc.: an astrologer; a magician, conjurer.
1535. Coverdale, Isa. ii. 6. Calkers of mens byrthes, whereof ye haue to many.
1584. R. Scot, Discov. Witchcr., VII. xv. 122. Imps, calcars, conjurors.
1662. Fuller, Worthies, I. 209. Forewarned (by what Calker I wot not).
