Triphenyltin

Part of speech: noun

Definitions

1. A chemical compound of tin bonded to three phenyl rings, used as a fungicide and pesticide in agriculture
2. An organometallic substance in which a tin atom carries three benzene-ring groups, employed to control fungi on crops
3. A tin-based organic chemical containing three phenyl groups, historically applied as an agricultural biocide and wood preservative

Etymology: Triphenyltin is a chemical coinage, not an old word with a long story, and its history is a straightforward piece of systematic chemical naming. "Tin" is the Old English "tin", a word that goes back to Germanic roots and has been in English since before the year 1000. "Phenyl" was named in the 1840s from "phene", a term for benzene coined by Auguste Laurent in the same period, and it came from the Greek "phainein", "to shine", because the gas was first obtained from illuminating gas. The prefix "tri-" is the ordinary Greek number meaning three, and it signals that three phenyl groups are attached to a single tin atom. Taken together, the name is a literal description of the molecule: a tin atom bearing three phenyl rings. Chemists in the late nineteenth and twentieth centuries built such names from parts in this way, which is why the word looks like a simple combination of familiar pieces. Its use as a fungicide and agricultural chemical came in the mid-twentieth century, and the name itself does not record that application.