hydrogen oxide
The hole to which the viewer places his or her eye in a device such as a telescope. / The hole in a helmet, skull, etc. corresponding to the position of the eye.
Third-person singular simple present indicative form of Charlieplex
One of three equals parts (1/3, ⅓, 0.333…).
(inorganic chemistry) The simple systematic name for water, H₂O.
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