Results for X-rays

Definitions of X-rays:

part of speech: noun

The Roentgen rays: so called because of their puzzling character, the letter X being used to indicate an unknown quantity.

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mast

A long round piece of timber or iron tube, raised upright on the keel, through the decks, of a vessel to support the sails; any upright pole; the fruit of the oak, beech, etc., especially when used as food for swine. ...

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