See Also: methyl(dictionary)
Methyl(medicine)
methyl red(medicine)
methyl green(medicine)
angular methyl(medicine)
methyl nicotinate(medicine)
methyl orange(medicine)
methyl parathion(medicine)
active methyl(medicine)
methyl methanesulfonate(medicine)

psocid (iou) and methyl (iou)


psocid (iou)



psocid noun. L19.
[mod. Latin Psocidae family name, from Psocus genus name, from Greek psokhein grind: see -ID3.]
Entomology. Any small insect with long antennae, of the order Psocoptera, which feeds on fragments of vegetable or animal matter in bark, straw, soil, among books and papers, etc.

methyl (iou)



methyl noun. M19.
[French methyle, German Methyl, back-form. from French methylene, German Methylen METHYLENE.]
Chemistry. The radical CH3 derived from methane, present in methanol, methanoic (formic) acid, etc. Usu. in comb.
Comb.: methyl alcohol = METHANOL; methylbenzene = TOLUENE; methylcellulose any of a range of white, tasteless compounds produced by etherifying cellulose and used as thickening, emulsifying, and stabilizing agents, esp. in foods, laxatives, and adhesives; methyldopa Pharmacology a whitish powder, C10H13NO4, used as a hypotensive agent; methyl ethyl ketone a colourless volatile liquid, CH3COCH2CH3, used as a solvent for organic materials; butanone; methyl green a green dye used in microscopy to stain chromatin; methyl isobutyl ketone a liquid ketone, (CH3)2CHCH2COCH3, used as a solvent; hexone, 4-methylpentan-2-one; methyl isocyanate a toxic gas, CH3NCO, used in making certain pesticides; methyl methacrylate a volatile colourless liquid, CH2C(CH3)COOCH3, that readily polymerizes to form resinous glassy materials such as Perspex and Plexiglas; such a polymeric material; methyl orange an orange crystalline compound which is the sodium salt of a sulphur-containing azo dye, chiefly used in solution as an acid-base indicator, giving a pink colour at pH 3 and yellow at pH 4.4; methylphenidate a sympathomimetic drug used as a CNS stimulant to treat various depressive and lethargic conditions; methyl red a red crystalline acidic azo dye, (CH3)2NC6H4N:NC6H4COOH, used in solution as an acid-base indicator, giving a red colour at pH 4.4 and yellow at pH 6; methyl rubber an early synthetic rubber made by polymerizing dimethylbutadiene; methyl salicylate a colourless or pale yellow liquid, C6H4(OH)COOCH3, the chief constituent of oil of wintergreen and sweet birch oil, which is used as a flavouring, in perfumery, and in analgesic liniments and ointments; methyltestosterone Pharmacology any of the methyl Derivatives of testosterone; esp. (more fully 17-methyltestosterone) a synthetic androgen used to treat hormonal imbalances and certain cancers; methylthiouracil a drug which inhibits thyroid activity and is used to control thyrotoxicosis; 6-methyl-2-thiouracil; methyl violet gentian violet.