Hypertext Webster Gateway: "Almacantar"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Almacantar \Al`ma*can"tar\, n. (Astron.)
(a) Same as {Almucantar}.
(b) A recently invented instrument for observing the heavenly
bodies as they cross a given almacantar circle. See
{Almucantar}.
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