[irreg. f. Gr. στέφανο-ς crown (taken in the sense of CORONA 1) + -νόμος distributor.] An instrument for measuring the angular dimensions of fog-bows, halos, etc.
1889. Times, 21 March, 3/3. The stephanome … is used for measuring the angular size of halos, fog-bows, and glories at the Ben Nevis Observatory.
1890. Lond., etc. Philos. Mag., Ser. V. XXIX. 454, note. A stephanome, consists of a graduated bar, at one end of which the eye is placed, and in which slides a cross-bar carrying certain projections. With its aid faint objects, for which a sextant would be useless, may be measured to within 5′.
