# What is the etymology of 'sinc function'?

The title says it all. I'm curious what the origin/etymology of the name 'sinc function' (pronounced 'sink') comes from. Presumably its a modification of 'sin'.

$\textrm{sinc}(x) \equiv \frac{ sin(x) }{x}$

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This is quite curious... I just came across the sinc function myself, and was wondering the same exact question! –  apnorton Feb 11 '13 at 2:34
This superannuated mathematician never heard of it --- looks like a neologism, maybe even a nonce word, or a hapax legomenon. –  Lubin Feb 11 '13 at 4:05