pyrethrin

py·re·thrin

 (pī-rē′thrĭn, -rĕth′rĭn)

n.

Either of two viscous liquid esters, C₂₁H₂₈O₃ or C₂₂H₂₈O₅, that are extracted from pyrethrum flowers and used as insecticides.

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[pyrethr(um) + -in.]

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

pyrethrin

(paɪˈriːθrɪn)

n

1. (Elements & Compounds) Also called: pyrethrin I an oily water-insoluble compound used as an insecticide. Formula: C21H28O3

2. (Elements & Compounds) Also called: pyrethrin II a compound of similar chemical structure and action, also found in pyrethrum. Formula: C22H28O5

[C19: from pyrethrum + -in]

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

py•re•thrin

(paɪˈri θrɪn, -ˈrɛθ rɪn)

n.

either of two chemicals, C₂₁H₂₈O₃ or C₂₂H₂₈O₅, extracted from pyrethrum flowers: used as an insecticide.

[1830–40; pyrethr (um) + -in¹]

Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

Translations

pyrethrin

n piretrina

English-Spanish/Spanish-English Medical Dictionary Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.