heroin meaning
EN
[ˈhɛr oʊ ɪn] [-ɪn] 
US WHeroin
- Heroin /ˈhɛroʊɪn/ (diacetylmorphine or morphine diacetate, also known as diamorphine (BAN, INN)) and commonly known by its street names of H, smack, boy, horse, brown, black, tar, and others is an opioid analgesic originally synthesized by C.R.
- Illicit heroin is sometimes available in freebase form, dulling the sheen and consistency to a matte-white powder. Because of its lower boiling point, the freebase form of heroin is also smokable.
- As with other opioids, diacetylmorphine is used as both a legal, medically prescribed drug (e.g., as an analgesic, cough suppressant and as an anti-diarrhea drug) and a recreational drug, in which case the user is seeking euphoria.
- Noun
- More Examples
- Used in the Middle of Sentence
- However, a novel form of cutaneous anthrax, termed injectional anthrax, that is characterized by severe soft tissue infection has been recently described in heroin users.
- Used in the Middle of Sentence
Definition of heroin in English Dictionary
- Part-of-Speech Hierarchy
- Nouns
- Singularia tantum
- Uncountable nouns
- Uncountable nouns
- Singularia tantum
- Nouns
- en heroine
- en heroines
- en heroinic
- en heroinism
- en heroinlike
Source: Wiktionary
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Grammatically, this word "heroin" is a noun, more specifically, a singularia tantum.