adv. In an acronycal manner as rising at the setting of the sun, and vice versa. [ 1913 Webster ]

{ } a. [ Gr. 'akro`nychos at nightfall; 'a`kros + ny`x night. ] (Astron.) Rising at sunset and setting at sunrise, as a star; -- opposed to cosmical. [ 1913 Webster ]

☞ The word is sometimes incorrectly written acronical, achronychal, acronichal, and acronical. [ 1913 Webster ]

a. [ Gr. 'akro`nyktos; 'a`kros + ny`x, nykto`s, night. ] (Astron.) Acronycal. [ 1913 Webster ]

n. A genus of rust fungi having aecia produced in raised or swollen sori and teliospores borne in waxy columns.
Syn. -- genus Cronartium. [ WordNet 1.5 ]

n. [ OD. kronie, karonie, an old sheep, OF. carogne, F. charogne, carrion (also F. carogne ill-natured woman.). See Carrion, and Crony. ] 1. An old ewe. [ Obs. ] Tusser. [ 1913 Webster ]

2. An old woman; -- usually in contempt. [ 1913 Webster ]

But still the crone was constant to her note. Dryden. [ 1913 Webster ]

3. An old man; especially, a man who talks and acts like an old woman. [ R. ] [ 1913 Webster ]

The old crone [ a negro man ] lived in a hovel, . . . which his master had given him. W. Irving. [ 1913 Webster ]

A few old battered crones of office. Beaconsfield. [ 1913 Webster ]

n. [ Cf. Coronel spearhead, Crown. ] The iron head of a tilting spear. [ 1913 Webster ]

n. [ Cf. Coronet, Crownet. ] The coronet of a horse. [ 1913 Webster ]

a. [ Gr. Kro`nios Saturnian, fr. Kro`nos Saturn. ] Saturnian; -- applied to the North Polar Sea. [ R. ] Milton. [ 1913 Webster ]

n. (Min.) A mineral consisting principally of silicate of iron, and crystallizing in hexagonal prisms with perfect basal cleavage; -- so named from the Swedish mineralogist Cronstedt. [ 1913 Webster ]

n.; pl. Cronies [ Orig., an old woman. See Crone. ] 1. A crone. [ Obs. ] “Marry not an old crony.” Burton. [ 1913 Webster ]

2. An intimate companion; a familiar friend. [ Colloq. ] [ 1913 Webster ]

He soon found his former cronies, though all rather the worse for the wear and tear of time. W. Irving. [ 1913 Webster ]

n. [ Trademark. ] a brand of polyester textile fiber, or the wrinkle-resistant fabric prepared from it.
Syn. -- dacron, Terylene. [ WordNet 1.5 ]

n. [ Gr. ge`a, gh^, the earth + Kro`nos Saturn, the alchemistic name of lead: cf. G. geokronit. ] (Min.) A lead-gray or grayish blue mineral with a metallic luster, consisting of sulphur, antimony, and lead, with a small proportion of arsenic. [ 1913 Webster ]

n. [ NL., fr. Gr. &unr_; long. ] (Pron.) A short, straight, horizontal mark [ - ], placed over vowels to denote that they are to be pronounced with a long sound; as, ā, in dāme; ē, in sēam, etc.
Syn. -- macrotone. [ 1913 Webster ]

n. [ NL., fr. Gr. mikro`s small. ] (Physics) A measure of length; the thousandth part of one millimeter; the millionth part of a meter. [ 1913 Webster ]

a. [ From Micronesia, fr. Gr. mikro`s small + nh^sos an island. ] Of or pertaining to Micronesia, a collective designation of the islands in the western part of the Pacific Ocean, embracing the Marshall and Gilbert groups, the Ladrones, the Carolines, etc. [ 1913 Webster ]

n. pl.; sing. Micronesian. (Ethnol.) A dark race inhabiting the Micronesian Islands. They are supposed to be a mixed race, derived from Polynesians and Papuans. [ 1913 Webster ]

n. [ Micro- + chronometer. ] An instrument for noting minute portions of time. [ 1913 Webster ]

n. [ Milli- + micron. ] The thousandth part of a micron or the millionth part of a millimeter; one nanometer; -- a unit of length sometimes used in measuring light waves, etc. [ Webster 1913 Suppl. ]

{ } a. [ L. mucronatus, fr. mucro a sharp point: cf. F. mucroné. ] Ending abruptly in a sharp point; abruptly tipped with a short and sharp point; as, a mucronate leaf. -- Mu"cro*nate*ly, adv. [1913 Webster]

a. Having, or tipped with, a small point or points. [ 1913 Webster ]

n. [ Gr. nekro`s a dead body. ] (Min.) Fetid feldspar, a mineral which, when struck, exhales a fetid odor. [ 1913 Webster ]

n. [ Written also omikron. ] [ NL., fr. Gr. Ο ο. See Micro-. ] Lit., the little, or short, O, o; the fifteenth letter of the Greek alphabet. [ Webster 1913 Suppl. ]

n.; pl. L. Pentacra E. Pentacrons [ NL., fr. Gr. pe`nte five + 'a`kron a summit. ] (Geom.) A solid having five summits or angular points. [ 1913 Webster ]

‖n.; pl. Polyacra E. Polyacrons [ NL., fr. Gr. poly`s many + 'a`kron summit. ] (Geom.) A solid having many summits or angular points; a polyhedron. [ 1913 Webster ]