hydroxyl, hydroxyl group, hydroxyl radical
(noun) the monovalent group -OH in such compounds as bases and some acids and alcohols
Source: WordNet® 3.1
hydroxyl (plural hydroxyls)
(chemistry) A univalent radical or functional group (–OH) in organic chemistry; present in alcohols, phenols, carboxylic acids and certain other classes of compounds.
Source: Wiktionary
Hy*drox"yl, n. Etym: [Hydro-, 2 + oxygen + -yl.] (Chem.)
Definition: A compound radical, or unsaturated group, HO, consisting of one atom of hydrogen and one of oxygen. It is a characteristic part of the hydrates, the alcohols, the oxygen acids, etc.
Source: Webster’s Unabridged Dictionary 1913 Edition
7 November 2024
(verb) remove by or as if by rubbing or erasing; “Please erase the formula on the blackboard--it is wrong!”
Coffee dates back to the 9th century. Goat herders in Ethiopia noticed their goats seem to be “dancing” after eating berries from a particular shrub. They reported it to the local monastery, and a monk made a drink out of it. The monk found out he felt energized and kept him awake at night. That’s how the first coffee drink was born.
