The moiety, —CH3. [G. methy, wine, + hyle, wood]
- active m. a m. group attached to a quaternary ammonium ion or a tertiary sulfonium ion that can take part in transmethylation reactions; e.g., m. groups in choline and in S-adenosyl-l-methionine, which are thus m. donors.
- angular m. a m. group attached to carbon 10 (between rings A and B) or to carbon 13 (between rings C and D) of the steroid nucleus.
- m. hydroxybenzoate SYN: methylparaben.
- m. isobutyl ketone in high concentrations it has narcotic action; in relatively low concentrations it may be irritating to the eyes and mucous membranes.
- m. methacrylate a thermoplastic material used for denture bases and as an embedding material for electron microscopy.

* * *

meth·yl 'meth-əl, Brit also 'mē-.thīl n an alkyl group CH3 that is derived from methane by removal of one hydrogen atom
me·thyl·ic mə-'thil-ik adj

* * *

meth·yl (methґəl) [Gr. methy wine + hylē wood] the chemical group or radical CH3, sometimes abbreviated Me.

Medical dictionary. 2011.

Игры ⚽ Поможем написать курсовую

Look at other dictionaries:

  • Methyl — Meth yl, n. [See {Methylene}.] (Chem.) A univalent hydrocarbon radical, {CH3 }, not existing alone but regarded as an essential residue of methane, and appearing as a component part of many derivatives; as, methyl alcohol, methyl ether, methyl… …   The Collaborative International Dictionary of English

  • methyl — univalent hydrocarbon radical, 1840, from Ger. methyl (1840) or directly from Fr. méthyle, back formation from Fr. méthylène (see METHYLENE (Cf. methylene)) …   Etymology dictionary

  • Methyl — Methyl, C2H3, das Radical des Holzgeistes u. seiner Verbindungen. Man hat es in neuerer Zeit isolirt dargestellt durch die Einwirkung von Kalium auf Cyanäthyl, ferner bei der Zersetzung des essigsauren Kalis durch den galvanischen Strom, endlich… …   Pierer's Universal-Lexikon

  • Methyl — CH3, einwertiges Radikal, das in zahlreichen organischen Verbindungen auftritt, im freien Zustand aber nicht existieren kann. Bei dem Versuch, es zu isolieren, vereinigen sich 2 Moleküle M. zu Dimethyl (Äthan, s. d.) C2H6 …   Meyers Großes Konversations-Lexikon

  • Methyl — Methȳl, einwertiges organisches Radikal, gibt mit Wasserstoff Methan (Grubengas), mit Hydroxyl den Methylalkohol; bei der Abscheidung aus Verbindungen vereinigen sich zwei Methyle zu Äthan …   Kleines Konversations-Lexikon

  • Methyl... — Methyl...   [französisch méthyle, rückgebildet aus méthylène »Holzgeist«, zu griechisch méthy »Wein« und hýlē »Holz«], Bezeichnung der chemischen Nomenklatur für die Atomgruppe CH3 …   Universal-Lexikon

  • methyl — ► NOUN Chemistry ▪ the radical CH3, derived from methane. ORIGIN from Greek methu wine + hul wood …   English terms dictionary

  • methyl — [meth′əl] n. [Fr méthyle, back form. < méthylène: see METHYLENE] the monovalent hydrocarbon radical CH3, normally existing only in combination, as in methanol methylic [me thil′ik] adj …   English World dictionary

  • Methyl-K — Chembox new ImageFile = Methyl K.png ImageSize = IUPACName = 1 (1,3 benzodioxol 5 yl) N methylpentan 2 amine OtherNames = Section1 = Chembox Identifiers CASNo = PubChem = SMILES = C1=C2C(=CC=C1CC(NC)CCC)OCO2 Section2 = Chembox Properties Formula …   Wikipedia

  • méthyl- — ⇒MÉTH(YL) , (MÉTH , MÉTHYL )élém. de compos. Élém. représentant le subst. méthyle dans un certain nombre de composés du domaine de la chim.; le 2e élém. est le plus souvent soudé. A. Méth . V. méthacrylique, méthane, méthionine et aussi:… …   Encyclopédie Universelle

  • methyl- — (= CH3) Specific reference to the methyl group is made when macromolecules are modified after synthesis by enzymic addition of methyl groups. The group is transferred to nucleic acids and proteins. See also methyl transferase and DNA methylation …   Dictionary of molecular biology

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”