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List of 13-letter words containing

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There are 19 thirteen-letter words containing 2A, O, P, R, T and X

APPROXIMATELYapproximately adv. Imprecise but close to in quantity or amount.
APPROXIMATE adv. close together.
APPROXIMATINGapproximating v. Present participle of approximate.
APPROXIMATE v. to come close to.
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.
APPROXIMATIVEapproximative adj. Of, relating to, or being an estimate or approximation.
approximative n. (Grammar) A grammatical construct that expresses approximation.
APPROXIMATIVE adj. approaching closely.
ARCHAEOPTERYXarchaeopteryx n. Alternative spelling of archeopteryx.
Archaeopteryx prop.n. A taxonomic genus within the family Archaeopterygidae – known from fossils and widely accepted as the…
archæopteryx n. Rare spelling of archeopteryx.
CEPHALOTHORAXcephalothorax n. The fused head and thorax of spiders and crustaceans.
CEPHALOTHORAX n. the body, or head with thorax, of spiders, crustaceans, etc.
EXASPERATIONSexasperations n. Plural of exasperation.
EXASPERATION n. the state of being exasperated.
EXPATRIATIONSexpatriations n. Plural of expatriation.
EXPATRIATION n. the act of expatriating.
EXPLANATORILYexplanatorily adv. With regard to explanation, or explanatory power.
EXPLANATORY adv. serving to explain, also EXPLANATIVE.
EXPLORATIONALexplorational adj. Of, pertaining to, or by means of exploration.
EXPLORATIONAL adj. relating to exploration.
EXPURGATORIALexpurgatorial adj. Tending or serving to expurgate; expurgatory.
EXPURGATORIAL adj. tending to expurgate or purify, also EXPURGATORY.
EXTRAPOLATINGextrapolating v. Present participle of extrapolate.
EXTRAPOLATE v. to infer (values of a variable in an unobserved interval) from values within an already observed interval.
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.
EXTRAPOLATIVEextrapolative adj. That serves to extrapolate.
EXTRAPOLATIVE adj. relating to extrapolation.
EXTRAPOLATORSextrapolators n. Plural of extrapolator.
EXTRAPOLATOR n. one who extrapolates.
EXTRAPOLATORYextrapolatory adj. Serving to extrapolate.
EXTRAPOLATORY adj. of or like an extrapolation.
EXTRATROPICALextratropical adj. Occurring outside the tropics, usually in temperate latitudes.
extratropical adj. (Meteorology) Lacking or having lost tropical characteristics.
EXTRATROPICAL adj. outside the tropics.
PROTOGALAXIESprotogalaxies n. Plural of protogalaxy.
PROTOGALAXY n. a galaxy in its initial state of formation.
XEROPHTHALMIAxerophthalmia n. (Ophthalmology) A condition due to a deficiency of vitamin A where the conjunctiva and cornea become…
XEROPHTHALMIA n. extreme dryness of the conjunctive, thought to stem from a vitamin A deficiency, also XEROMA.

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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