PENTAMETHYLENE

Pen`ta*meth"yl*ene, n. Etym: [Penta- + methylene.] (Chem.)

Definition: A hypothetical hydrocarbon, C5H10, metameric with the amylenes, and the nucleus of a large number of derivatives; -- so named because regarded as composed of five methylene residues. Cf. Trimethylene, and Tetramethylene.

Source: Webster’s Unabridged Dictionary 1913 Edition



RESET




Word of the Day

2 July 2025

RESTITUTION

(noun) getting something back again; “upon the restitution of the book to its rightful owner the child was given a tongue lashing”


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Coffee Trivia

“Coffee, the favorite drink of the civilized world.” – Thomas Jefferson, third president of the United States

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