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Cocaine

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Merriam-Webster's Collegiate Dictionaryco·caine \kō-ˈkān, ˈkō-ˌ\ noun DATE  1874
: a bitter crystalline alkaloid C17H21NO4 obtained from coca leaves that is used especially in the form of its hydrochloride medically as a topical anesthetic and illicitly for its euphoric effects and that may result in a compulsive psychological need
English Etymologycocaine  1874, from Fr. cocaine (1856), coined by Albert Niemann of Gottingen University from coca (from Quechua cuca) + -ine, arbitrary use of L. -inus, -ina for noun ending. A medical coinage, the drug was used 1870s as a local anaesthetic for eye surgery, etc.
Oxford Collocations Dictionary for Students of EnglishOxford Collocations dictionary for students of Englishcocaine noun 
ADJ. crack, freebase QUANT. line, packet VERB + COCAINE freebase, inject, shoot, smoke, sniff, snort COCAINE + NOUN possession | injection | export | baron | cartel 　• Note at DRUG(for more verbs and nouns) 
Oxford Advanced Learner's Dictionary-牛津双解-OALD7cocaineco·caine / kEu5kein; NAmE kou- / (also informal coke) noun[U]   a powerful drug that some people take illegally for pleasure and can become addicted to. Doctors sometimes use it as an anaesthetic .   可卡因；古柯硷
Webster's Third New International Dictionary, UnabridgedSearch result show the entry is found in: cocaine family , or cocaine plantco·caine\kōˈkān, kəˈ-, ˈkōˌk- sometimes ˈkōkəˌēn or -k(ə)in\ noun(-s)Etymology: International Scientific Vocabulary coca + -ine; originally formed as German kokain1. : a bitter crystalline alkaloid C17H21NO4 obtained from coca leaves and synthesized from ecgonine that has first a stimulating then a narcotic effect if taken internally, in large doses produces intoxication like that from hemp, and acts as a local anesthetic and mydriatic; methyl-benzoyl-ecgonine2. : any of several alkaloids found in coca that are derived from ecgonine

Cocaine Coca Noun Co·Caine A Bitter Crystalline Alkaloid