List of 13-letter words containing •••••••

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There are 20 thirteen-letter words containing H, 2I, 3O, P and T

HISTIOPHOROID	• HISTIOPHOROID adj. related to a genus of swordfish.
IONTOPHORESIS	• iontophoresis n. (Medicine) A treatment in which electrodes are put in contact with tissue and a voltage is applied in… • IONTOPHORESIS n. the introduction of an ionized substance, such as a drug, through intact skin by the application of a direct electric current.
IONTOPHORETIC	• iontophoretic adj. Of or pertaining to iontophoresis. • IONTOPHORETIC adj. relating to iontophoresis.
OLIGOTROPHIES	• OLIGOTROPHY n. the state of being oligotrophic.
ORNITHOPHOBIA	• ornithophobia n. Fear of birds. • ORNITHOPHOBIA n. fear of birds.
ORTHOPINAKOID	• ORTHOPINAKOID n. in monoclinic crystals, a form consisting of two faces parallel to the orthodiagonal and the vertical axis.
PHOTOBIOLOGIC	• photobiologic adj. Synonym of photobiological. • PHOTOBIOLOGIC adj. relating to photobiology, also PHOTOBIOLOGICAL.
PHOTOEMISSION	• photoemission n. (Physics) the ejection of electrons from the surface of a solid by incident electromagnetic radiation. • PHOTOEMISSION n. the release of electrons from a usually solid material (as a metal) by means of energy supplied by incidence of radiation and esp. light.
PHOTOFISSIONS	• photofissions n. Plural of photofission. • photofissions v. Third-person singular simple present indicative form of photofission. • PHOTOFISSION n. nuclear fission induced by gamma rays.
PHOTOIONISING	• PHOTOIONISE v. to ionize by electromagnetic radiation, also PHOTOIONIZE.
PHOTOIONIZING	• photoionizing adj. That causes or undergoes photoionization. • PHOTOIONIZE v. to ionize by electromagnetic radiation, also PHOTOIONISE.
PHOTOOXIDISED	• PHOTOOXIDISE v. to undergo photooxidation, also PHOTOOXIDIZE.
PHOTOOXIDISES	• PHOTOOXIDISE v. to undergo photooxidation, also PHOTOOXIDIZE.
PHOTOOXIDIZED	• photooxidized v. Simple past tense and past participle of photooxidize. • PHOTOOXIDIZE v. to undergo photooxidation, also PHOTOOXIDISE.
PHOTOOXIDIZES	• photooxidizes v. Third-person singular simple present indicative form of photooxidize. • PHOTOOXIDIZE v. to undergo photooxidation, also PHOTOOXIDISE.
PHOTOPERIODIC	• photoperiodic adj. Of, pertaining to, or exhibiting photoperiodism. • PHOTOPERIODIC adj. relating to a photoperiod.
PHOTOPOSITIVE	• photopositive adj. (Biology) having a positive phototropic or phototactic response; attracted by light. • PHOTOPOSITIVE adj. exhibiting positive phototropism or phototaxis.
PHOTOTOXICITY	• phototoxicity n. Any adverse effect due to exposure to light, especially such effects on the skin. • PHOTOTOXICITY n. the state of being phototoxic.
PROTOHISTORIC	• protohistoric adj. Of or pertaining to protohistory. • PROTOHISTORIC adj. relating to protohistory.
TOXICOPHOBIAS	• TOXICOPHOBIA n. the morbid fear of poisoning, also TOXIPHOBIA.

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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English Wiktionary: 54 words
Scrabble in French: 7 words
Scrabble in Spanish: 5 words
Scrabble in Italian: 2 words
Scrabble in German: no word
Scrabble in Romanian: 17 words

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