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List of 13-letter words containing

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There are 12 thirteen-letter words containing A, C, H, I, T and X

CANTHAXANTHINcanthaxanthin n. (Organic chemistry) A xanthophyll pigment found in many plants and animals.
CANTHAXANTHIN n. a naturally occurring carotenoid used esp. as a color additive for food, also CANTHAXANTHINE.
HEXACTINELLIDhexactinellid n. Any of the many sponges of class Hexactinellida, which have hexactine spicules; a glass sponge.
HEXACTINELLID n. a kind of six-rayed sponge.
HYDROXYACETICHYDROXYACETIC adj. as in hydroxyacetic acid, another name for glycolic acid.
PHYCOXANTHINSPHYCOXANTHIN n. a yellow pigment found in diatoms, brown seaweeds etc.
TACHYPHYLAXIStachyphylaxis n. (Medicine) A rapidly decreasing response to a drug following administration of the initial doses.
TACHYPHYLAXIS n. very rapid development of tolerance or immunity to the effects of a drug.
TOXICOPHAGOUSTOXICOPHAGOUS adj. eating poison, also TOXIPHAGOUS.
TOXICOPHOBIASTOXICOPHOBIA n. the morbid fear of poisoning, also TOXIPHOBIA.
XANTHOCHROIASXANTHOCHROIA n. yellowness of the skin.
XANTHOCHROIDSxanthochroids n. Plural of xanthochroid.
XANTHOCHROID n. a blond-haired and blue eyed person with fair white skin.
XANTHOCHROISMxanthochroism n. Alternative form of xanthochromism.
XANTHOCHROISM n. a condition in which all skin pigments except yellow disappear.
XANTHOCHROMIAxanthochromia n. (Medicine) The yellowish appearance of cerebrospinal fluid that accompanies certain conditions, especially…
XANTHOCHROMIA n. any yellowish discoloration, esp. of the cerebrospinal fluid.
XEROPHTHALMICxerophthalmic adj. Of or pertaining to xerophthalmia.
XEROPHTHALMIC adj. relating to xerophthalmia.

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 1Word.ws and WikWik.org.

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