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An instrument used, especially in trigonometrical surveying, for the accurate measurement of horizontal angles, and also usually of vertical angles. It is variously constructed.

to fact; in accordance with the actual state of things; correct; not false, erroneous, inaccurate, or the like; as, a true relation or narration; a true history; a declaration is true when it states the facts.

Exactly; justly; precisely; accurately; as, to estimate truly the weight of evidence.

ar suspended at its center of gravity by a long thread, constituting a delicate means for accurately measuring magnetic intensities, also for determining declinations of the magnetic needle.

Vernier gauge, a gauge with a graduated bar and a sliding jaw bearing a vernier, used for accurate measurements. -- Vernier compass, a surveyor's compass with a vernier for the accurate adjustment of the zero point in accordance with magnetic variation. -- Vernier transit, a surveyor's transit instrument with a verni…

s only, so as to present it clearly to the mind, as if in a picture. -- Word picture, an accurate and vivid description, which presents an object clearly to the mind, as if in a picture. -- Word square, a series of words so arranged that they can be read vertically and horizontally with like results.…

with a central pit, the fovea centralis, in the center of the retina where vision is most accurate. See Eye. (b) (Zoöl.) A small American butterfly (Polites Peckius) of the Skipper family. Its wings are brownish, with a large, irregular, bright yellow spot on each of the hind wings, most conspicuous beneath. Called als…