Decyl n. : A hydrocarbon radical, C10H21, never existing alone, but regarded as the characteristic constituent of a number of compounds of the paraffin series.

Example:
How to use STD (Sodium Tetra Decyl) in treatment of varises? Is it safe?

Taxonomy
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Defination from the web:
decyl (plural decyls) (organic chemistry) Either of very many isomeric univalent hydrocarbon radicals, C10H21, formally derived from decane by the loss of a proton ... Retrieved from "http://en.wiktionary.org/wiki/decyl" Categories: English nouns | Organic chemistry. Views. Entry ...