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 There are 6 thirteen-letter words containing I, 2O, P, X and Y| CLINOPYROXENE | • clinopyroxene n. (Mineralogy) Any pyroxene that has a monoclinic crystal structure. • CLINOPYROXENE n. a member of the pyroxene group of minerals having a monoclinic crystal structure, such as augite, diopside, or jadeite.
 |  | HYDROPEROXIDE | • hydroperoxide n. (Organic chemistry) any mono-substituted derivative of hydrogen peroxide - ROOH. • HYDROPEROXIDE n. a compound containing an O2H group.
 |  | PHOTOTOXICITY | • phototoxicity n. Any adverse effect due to exposure to light, especially such effects on the skin. • PHOTOTOXICITY n. the state of being phototoxic.
 |  | PHYTOTOXICITY | • phytotoxicity n. (Uncountable) The condition of being phytotoxic. • phytotoxicity n. (Countable) A measure of the extent to which something is phytotoxic.
 • PHYTOTOXICITY n. the state of being phytotoxic.
 |  | POLYSILOXANES | • polysiloxanes n. Plural of polysiloxane. • POLYSILOXANE n. any of a number of polymers which are the basis of silicone chemistry.
 |  | XIPHOPHYLLOUS | • xiphophyllous adj. (Botany) Having sword-shaped leaves. • XIPHOPHYLLOUS adj. having sword-shaped leaves.
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 Scrabble words — in black are valid world wide — in RED are not valid in North America — in GREEN are valid only in North America.Definitions are short excerpt from the WikWik.org and 1Word.ws.
 
 See this list for:English Wiktionary: 63 wordsScrabble in French: 6 wordsScrabble in Spanish: 3 wordsScrabble in Italian: no wordScrabble in German: no wordScrabble in Romanian: no word
 
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