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 There are 5 twelve-letter words containing M, 2O, R, X and Y| HYDROXONIUMS | • hydroxoniums n. Plural of hydroxonium. • HYDROXONIUM n. the obsolete name for the cation H3O+ derived from protonation of water.
 |  | METHOXYCHLOR | • methoxychlor n. (Organic chemistry) A synthetic organochlorine used as an insecticide. • METHOXYCHLOR n. a relatively nontoxic organochlorine insecticide.
 |  | MORPHOSYNTAX | • morphosyntax n. (Linguistics) Morphology and syntax regarded as an interlinked unit. • morpho-syntax n. (Linguistics) The system of the internal structure of words (morphology) and the way in which words…
 • morpho-syntax n. (Linguistics, formal) Grammar.
 |  | OROMAXILLARY | • oromaxillary adj. Relating to the mouth and the maxilla. • OROMAXILLARY adj. relating to the passages between the sinuses and the roof of the mouth.
 |  | SEROTAXONOMY | • SEROTAXONOMY n. serological analysis as a source of information for taxonomic classification. | 
 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: 32 wordsScrabble in French: 1 wordScrabble in Spanish: no wordScrabble in Italian: no wordScrabble in German: no wordScrabble in Romanian: no word
 
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