rare. [f. SPHERE sb.]

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  1.  Naut. (See quots.)

2

1862.  Catal. Internat. Exhib., Brit., II. No. 2775, A ‘sphereometer,’ for facilitating the practice of great circle sailing.

3

1863.  A. Young, Naut. Dict., 361. Sphereometer, a contrivance ‘for facilitating great circle sailing by obviating abstruse calculations.’

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  2.  = SPHEROMETER (Knight, 1884).

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