Translation
fold, bosom; bay, gulf
Examples
portabat.
She was carrying the boy at her breast.
.
The ships came into the bay.
.
The gulf of the sea was wide.
.
The fold of his garment was full.
protulit.
He brought out a letter from the fold of his toga.
Sinus, sinus is fourth declension masculine. The literal sense is a fold or a curve, above all the loose fold of a toga across the chest, which served a Roman as both pocket and cradle: in sinu portare covers carrying a letter and carrying a child.
From the curve comes the geographical use, a bay or gulf, still visible in Sinus Persicus. From the toga comes "bosom" in every affectionate sense. The mathematical sine is an accident: twelfth century translators met Arabic jayb, "pocket", rendered it sinus, and the name stuck to a trigonometric function that has nothing to do with clothing.
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sinus: worksheet, infographic and listicle
Free printable study downloads for the Latin word "sinus" (fold, bosom; bay, gulf): a worksheet with the answer key built in, an infographic, and a sentence listicle. Open any one to view, print or save.
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Start your free weekThis word is part of lesson 12.