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There are 14 words beginning with ACTINI

ACTINIAactinia n. A sea anemone, specifically a member of the genus Actinia.
Actinia prop.n. A taxonomic genus within the family Actiniidae – certain sea anemones.
ACTINIA n. (Greek) a sea-anemone, also ACTINIAN.
ACTINICactinic adj. Of or relating to actinism.
actinic adj. Composed of actin.
ACTINIC adj. of or pertaining to actinism, the property of solar radiation of causing chemical change.
ACTINIAEactiniae n. Plural of actinia.
ACTINIA n. (Greek) a sea-anemone, also ACTINIAN.
ACTINIANactinian n. A sea anemone (of the order Actiniaria).
ACTINIAN n. a sea-anemone, also ACTINIA.
ACTINIASactinias n. Plural of actinia.
ACTINIA n. (Greek) a sea-anemone, also ACTINIAN.
ACTINIDEactinide n. (Chemistry) Any of the 15 radioactive elements of the periodic table from actinium to lawrencium that…
actinide n. (Chemistry) Any of the 14 elements from actinium to nobelium (lawrencium is excluded by some authors…
actinide n. (Chemistry, dated) Any of the 14 elements from thorium to lawrencium (actinium having been mistakenly…
ACTINISMactinism n. (Chemistry, physics) That property of electromagnetic radiation that leads to the production of photochemical effects.
ACTINISM n. the property of radiant energy that effects chemical changes.
ACTINIUMactinium n. A radioactive, metallic chemical element (symbol: Ac) with an atomic number of 89; found in uranium ores.
ACTINIUM n. a radioactive metallic chemical element, atomic number 89, the first element of the actinide series.
ACTINIANSactinians n. Plural of actinian.
ACTINIAN n. a sea-anemone, also ACTINIA.
ACTINIDESactinides n. Plural of actinide.
ACTINIDE n. any element of a group from element number 89 (actinium) to 103 (lawrencium), also ACTINOID.
ACTINISMSactinisms n. Plural of actinism.
ACTINISM n. the property of radiant energy that effects chemical changes.
ACTINIUMSactiniums n. Plural of actinium.
ACTINIUM n. a radioactive metallic chemical element, atomic number 89, the first element of the actinide series.
ACTINIFORMactiniform adj. Having a radiated form.
ACTINIFORM adj. having a radiate form, like a starfish.
ACTINICALLYactinically adv. In an actinic manner.
ACTINIC adv. of or pertaining to actinism, the property of solar radiation of causing chemical change.

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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