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There are 18 thirteen-letter words containing ACTIN

ACTINOBACILLI• actinobacilli n. Plural of actinobacillus.
• ACTINOBACILLUS n. a bacillus of the genus of bacteria Actinobacillus.
ACTINOBIOLOGY• actinobiology n. The study of the effects of radiation upon living organisms.
• ACTINOBIOLOGY n. the branch of biology concerned with the effects of radiation on living organisms.
ACTINOMETRIES• actinometries n. Plural of actinometry.
• ACTINOMETRY n. the measurement of heating power of the sun's rays.
ACTINOMORPHIC• actinomorphic adj. (Botany, of a flower) Having its petals arranged in a radially symmetric fashion.
• ACTINOMORPHIC adj. radially symmetric, also ACTINOMORPHOUS.
ACTINOMYCETES• actinomycetes n. Plural of actinomycete.
• ACTINOMYCETE n. a filamentous microorganism like both bacteria and fungi, also ACTINOMYCES.
ACTINOMYCOSES• actinomycoses n. Plural of actinomycosis.
• ACTINOMYCOSIS n. a parasitic disease in men and cattle resulting in inflammation of the jaw.
ACTINOMYCOSIS• actinomycosis n. (Pathology) An infectious bacterial disease of cattle and swine, sometimes transmitted to man, characterized…
• ACTINOMYCOSIS n. a parasitic disease in men and cattle resulting in inflammation of the jaw.
ACTINOMYCOTIC• actinomycotic adj. Of or pertaining to actinomycosis.
• ACTINOMYCOTIC adj. relating to actinomycosis, a parasitic disease in men and cattle resulting in inflammation of the jaw.
ACTINOTHERAPY• actinotherapy n. (Medicine) The treatment of disease, especially skin disease, by exposure to ultraviolet light; radiotherapy.
• ACTINOTHERAPY n. the use of ultraviolet and other actinic rays in medical treatment.
ACTINOURANIUM• actinouranium n. Alternative spelling of actino-uranium.
• actino-uranium n. Uranium-235.
• ACTINOURANIUM n. the isotope of uranium that has a mass number of 235.
COUNTERACTING• counteracting v. Present participle of counteract.
• COUNTERACT v. to act counter or in opposition to.
DISTRACTINGLY• distractingly adv. In a distracting manner.
• DISTRACTING adv. DISTRACT, to divert the attention of.
HEXACTINELLID• hexactinellid n. Any of the many sponges of class Hexactinellida, which have hexactine spicules; a glass sponge.
• HEXACTINELLID n. a kind of six-rayed sponge.
PROTACTINIUMS• PROTACTINIUM n. a radioactive metallic chemical element, a member of the actinide series which occurs as a decay product in uranium ores.
PROTOACTINIUM• protoactinium n. Dated form of protactinium.
• PROTOACTINIUM n. a radioactive element that yields actinium on disintegration.
TRANSACTINIDE• transactinide adj. (Chemistry, physics) Lying beyond lawrencium (the last actinide) in the periodic table; having an atomic…
• transactinide n. (Chemistry, physics) Any of the artificially produced elements having an atomic number greater than 103.
• TRANSACTINIDE n. an element with atomic weight higher than those of the actinide series.
UNDERREACTING• underreacting v. Present participle of underreact.
• UNDERREACT v. to react with less than appropriate force or intensity.
UNDISTRACTING• undistracting adj. Not distracting.
• UNDISTRACTING adj. not distracting.

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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See this list for:

  • English Wiktionary: 95 words
  • Scrabble in French: 7 words
  • Scrabble in Spanish: 4 words
  • Scrabble in Italian: no word
  • Scrabble in German: no word
  • Scrabble in Romanian: 17 words

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