LACTAM
Noun
lactam (plural lactams)
(organic chemistry) Any of a class of cyclic amides that are the nitrogen analogs of lactones, formed by heating amino acids; the tautomeric enol forms are known as lactims.
Usage notes
Greek prefixes indicate the ring size e.g. α- 3-membered, β- 4-membered.
Source: Wiktionary
Lac"tam, n. Etym: [Lactone + amido.] (Chem.)
Definition: One of a series of anhydrides of an amido type, analogous to the lactones, as oxindol.
Source: Webster’s Unabridged Dictionary 1913 Edition
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LEFT
(adjective) being or located on or directed toward the side of the body to the west when facing north; “my left hand”; “left center field”; “the left bank of a river is bank on your left side when you are facing downstream”
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