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List of 13-letter words containing

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There are 17 thirteen-letter words containing 2A, 2O, T and X

APPROXIMATIONapproximation n. The act, process or result of approximating.
approximation n. (Mathematics) An imprecise solution or result that is adequate for a defined purpose.
approximation n. (Medicine) The act of bringing together the edges of tissue to be sutured.
AUTOTOXAEMIASautotoxaemias n. Plural of autotoxaemia.
AUTOTOXAEMIA n. self-poisoning caused by absorption of toxic products originating within the body, also AUTOTOXEMIA.
AUTOXIDATIONSautoxidations n. Plural of autoxidation.
AUTOXIDATION n. oxidation by direct combination with oxygen at ordinary temperatures.
CARBOXYLATIONcarboxylation n. (Organic chemistry) Any reaction that introduces a carboxylate group into a molecule.
CARBOXYLATION n. the act of carboxylating.
CEPHALOTHORAXcephalothorax n. The fused head and thorax of spiders and crustaceans.
CEPHALOTHORAX n. the body, or head with thorax, of spiders, crustaceans, etc.
EXPLORATIONALexplorational adj. Of, pertaining to, or by means of exploration.
EXPLORATIONAL adj. relating to exploration.
EXTRAPOLATIONextrapolation n. (Mathematics) A calculation of an estimate of the value of some function outside the range of known values.
extrapolation n. An inference about some hypothetical situation based on known facts.
extrapolation n. (Music) The diametric opposite of interpolation.
EXTRAPOLATORSextrapolators n. Plural of extrapolator.
EXTRAPOLATOR n. one who extrapolates.
EXTRAPOLATORYextrapolatory adj. Serving to extrapolate.
EXTRAPOLATORY adj. of or like an extrapolation.
HAEMATOXYLONSHAEMATOXYLON n. any thorny leguminous tree of the genus Haematoxylon, esp. the logwood, of tropical America and SW Africa, the heartwood of which yields the dye haematoxylin.
OVERTAXATIONSovertaxations n. Plural of overtaxation.
OVERTAXATION n. excessive taxation.
OXALOACETATESoxaloacetates n. Plural of oxaloacetate.
OXALOACETATE n. a salt or ester of oxaloacetic acid, also OXALACETATE.
PROTOGALAXIESprotogalaxies n. Plural of protogalaxy.
PROTOGALAXY n. a galaxy in its initial state of formation.
TAXONOMICALLYtaxonomically adv. In terms of taxonomy.
TAXONOMICAL adv. relating to taxonomy, the science of classifying living organisms, also TAXONOMIC.
XANTHOCHROIASXANTHOCHROIA n. yellowness of the skin.
XANTHOCHROMIAxanthochromia n. (Medicine) The yellowish appearance of cerebrospinal fluid that accompanies certain conditions, especially…
XANTHOCHROMIA n. any yellowish discoloration, esp. of the cerebrospinal fluid.
ZOOXANTHELLAEzooxanthellae n. Plural of zooxanthella.
ZOOXANTHELLA n. a symbiotic dinoflagellate of the genus Symbiodinium that lives in the tissues of a number of marine invertebrates and protists.

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.

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