List of 9-letter words beginning with

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There are 18 nine-letter words beginning with IO

IODATIONS	• iodations n. Plural of iodation. • IODATION n. the act of iodating.
IODINATED	• iodinated v. Simple past tense and past participle of iodinate. • iodinated adj. (Chemistry) Treated or reacted with iodine or hydroiodic acid. • iodinated adj. (Chemistry) Formally derived from another compound by the replacement of one or more atoms of hydrogen with iodine.
IODINATES	• iodinates v. Third-person singular simple present indicative form of iodinate. • IODINATE v. to treat with iodine, also IODATE.
IODOFORMS	• iodoforms n. Plural of iodoform. • IODOFORM n. a lemon-yellow crystalline compound of iodine with a saffron-like odour, used as an antiseptic.
IODOMETRY	• iodometry n. (Chemistry) An analytical technique that uses the sudden disappearance (or appearance) of iodine to… • IODOMETRY n. a procedure for determining the amount of iodine present in a substance.
IODOPHILE	• iodophile n. An iodophilic cell. • IODOPHILE adj. esp. of bacteria containing compounds similar to starch, readily stained by iodine.
IODOPHORS	• iodophors n. Plural of iodophor. • IODOPHOR n. a soluble compound of iodine used in making disinfectants.
IODOPSINS	• iodopsins n. Plural of iodopsin. • IODOPSIN n. a light sensitive pigment in retinal cones.
IODYRITES	• iodyrites n. Plural of iodyrite. • IODYRITE n. native silver iodide, a yellow or greenish mineral crystallizing in the hexagonal system.
IONICALLY	• ionically adv. (Chemistry) using ionic bonds. • IONIC adv. relating to a kind of chemical bond.
IONISABLE	• IONISABLE adj. that can be ionised, also IONIZABLE.
IONIZABLE	• ionizable adj. Capable of being ionized. • IONIZABLE adj. that can be ionized, also IONISABLE.
IONOGENIC	• ionogenic adj. (Chemistry) Capable of forming ions; used especially of the component of an ion exchanger that can be… • IONOGENIC adj. forming ions.
IONOPAUSE	• ionopause n. The boundary layer of the ionosphere, where it meets the mesosphere or exosphere. • IONOPAUSE n. the region of the earth's atmosphere at the outer limit of the ionosphere.
IONOPHORE	• ionophore n. (Chemistry) Any substance that can transfer ions from a hydrophilic medium (such as water) to a hydrophobic… • IONOPHORE n. a chemical compound able to combine with an ion and enable it to pass through a cell membrane.
IONOSONDE	• ionosonde n. A radar for the examination of the ionosphere. • IONOSONDE n. an instrument for measuring ionization.
IONOTROPY	• ionotropy n. (Chemistry) A form of tautomerism involving the movement or redistribution of charges. • ionotropy n. (Physiology) The regulation of neurotransmitters or cell receptors by ion channels. • IONOTROPY n. the reversible interconversion of a pair of organic isomers.
IOTACISMS	• iotacisms n. Plural of iotacism. • IOTACISM n. excessive use of the letter iota.

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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English Wiktionary: 62 words
Scrabble in French: 33 words
Scrabble in Spanish: 19 words
Scrabble in Italian: 34 words
Scrabble in German: 6 words
Scrabble in Romanian: 79 words

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