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See 3d Trone, 2. [Obs. or Scott.]

A native double salt, consisting of a combination of neutral and acid sodium carbonate, Na2CO3.2HNaCO3.2H2O, occurring as a white crystalline fibrous deposit from certain soda brine springs and lakes; -- called also urao, and by the ancients nitrum.

A toll or duty paid for weighing wool; also, the act of weighing wool. [Obs.] Nares.

An officer in London whose duty was to weigh wool. [Obs.]

A throne. [Obs.] Chaucer.

xtremities, and supported by a wooden pillar. It is now mostly disused. [Scot.] Jamieson. Trone stone, a weight equivalent to nineteen and a half pounds. [Scot.] -- Trone weight, a weight formerly used in Scotland, in which a pound varied from 21 to 28 ounces avoirdupois.

Native carbonate of soda; natron.

That point in the orbit of a double star where the smaller star is farthest from its primary.

One who is versed in astronomy; one who has a knowledge of the laws of the heavenly orbs, or the principles by which their motions are regulated, with their various phenomena. An undevout astronomer is mad. Young.

An astrologer. [Obs.]

Astronomical.

Of or pertaining to astronomy; in accordance with the methods or principles of astronomy. -- As`tro*nom"ic*al*ly, adv. Astronomical clock. See under Clock. -- Astronomical day. See under Day. -- Astronomical fractions, Astronomical numbers. See under Sexagesimal.

To study or to talk astronomy. [R.] They astronomized in caves. Sir T. Browne.

Astrology. [Obs.] Not from the stars do I my judgment pluck; And yet methinks I have astronomy. Shak.

A reflecting optical glass or instrument; a mirror. [Obs.]

ling a lemon, but larger, and pleasantly aromatic. The thick rind, when candied, is the citron of commerce.

See Electron.

Pertaining to, or derived from, dextrose; as, dextronic acid. Dextronic acid, a sirupy substance obtained by the partial oxidation of various carbohydrates, as dextrose, etc.

Amber; also, the alloy of gold and silver, called electrum.

Of or pertaining to an electron or electrons.