actinium

== English == === Etymology === Borrowed from French actinium. actin- +‎ -ium. === Pronunciation === enPR: ăktĭn'ēəm, IPA(key): /ækˈtɪniəm/ === Noun === actinium (usually uncountable, plural actiniums) A radioactive, metallic chemical element (symbol: Ac) with an atomic number of 89; found in uranium ores. ==== Derived terms ==== ==== Related terms ==== ==== Translations ==== == Danish == === Alternative forms === aktinium === Etymology === From Ancient Greek ἀκτίς (aktís) +‎ -ium. === Noun === actinium (singular definite actiniummet, not used in plural form) actinium ==== Declension ==== === References === “actinium” in Den Danske Ordbog == Dutch == === Etymology === Borrowed from French actinium. === Pronunciation === IPA(key): /ɑkˈti.ni.ʏm/ Hyphenation: ac‧ti‧ni‧um === Noun === actinium n (uncountable, no diminutive) actinium [from ca. 1900] ==== Related terms ==== actinide == French == === Pronunciation === IPA(key): /ak.ti.njɔm/ === Noun === actinium m (uncountable) actinium === Further reading === “actinium”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012 == Latin == === Etymology === From Ancient Greek ἀκτίς, ἀκτῖν- (aktís, aktîn-, “ray”). === Pronunciation === (Classical Latin) IPA(key): [akˈtiː.ni.ũː] (modern Italianate Ecclesiastical) IPA(key): [akˈtiː.ni.um] === Noun === actīnium n (genitive actīniī); second declension actinium ==== Declension ==== Second-declension noun (neuter). == Norwegian Bokmål == === Etymology === First part actin- from Ancient Greek ἀκτίς (aktís, “ray, beam”), from Proto-Hellenic [Term?], from Proto-Indo-European *nókʷ-t-u-s ~ *n̥kʷ-t-éw-s, from *nókʷts (“night”), from *negʷ- (“bare, naked”). Last part from Latin -ium (forms names of chemical elements), from -ius (forms adjectives). === Pronunciation === IPA(key): /akˈtiːnɪʉm/ Rhymes: -ʉm Hyphenation: ac‧ti‧ni‧um === Noun === actinium n (definite singular actiniumet, indefinite plural actinium, definite plural actiniuma or actiniumene) (organic chemistry) actinium (a radioactive, metallic chemical element (symbol: Ac) with an atomic number of 89; found in uranium ores) === References === “actinium” in The Bokmål Dictionary. “actinium” in Det Norske Akademis ordbok (NAOB). “actinium” in Store norske leksikon