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americium

americium (symbol Am) Radioactive metallic element of the actinide series, first made (1944) by US nuclear chemist Glenn Seaborg (1912–99) and others by neutron bombardment of plutonium. It is used in smoke detectors, and Am241 is a source of gamma rays. Properties: at.no. 95; r.a.m. 243.13; r.d. 13.67; m.p. 995°C (1821°F); b.p. unknown; most stable isotope Am243 (half-life 7650 yr).

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"americium." World Encyclopedia. . Encyclopedia.com. 23 Oct. 2017 <http://www.encyclopedia.com>.

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AM

AM • abbr. ∎  amplitude modulation. ∎  Master of Arts.

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"AM." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. 23 Oct. 2017 <http://www.encyclopedia.com>.

"AM." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. (October 23, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/am-5

"AM." The Oxford Pocket Dictionary of Current English. . Retrieved October 23, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/am-5

am

am (Ger.). At the, on the, to the, by the, near the. As in Am Meer, by the sea.

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"am." The Concise Oxford Dictionary of Music. . Encyclopedia.com. 23 Oct. 2017 <http://www.encyclopedia.com>.

"am." The Concise Oxford Dictionary of Music. . Encyclopedia.com. (October 23, 2017). http://www.encyclopedia.com/arts/dictionaries-thesauruses-pictures-and-press-releases/am

"am." The Concise Oxford Dictionary of Music. . Retrieved October 23, 2017 from Encyclopedia.com: http://www.encyclopedia.com/arts/dictionaries-thesauruses-pictures-and-press-releases/am

am

am / am/ • 1st person singular present of be.

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"am." The Oxford Pocket Dictionary of Current English. . Retrieved October 23, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/am-7

Am

Am • symb. the chemical element americium.

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Am (chemical symbol)

Am, symbol for the element americium.

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"Am (chemical symbol)." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. 23 Oct. 2017 <http://www.encyclopedia.com>.

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"Am (chemical symbol)." The Columbia Encyclopedia, 6th ed.. . Retrieved October 23, 2017 from Encyclopedia.com: http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/am-chemical-symbol

AM

AM Abbreviation of amplitude modulation

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AM (abbreviation for amplitude modulation)

AM: see modulation; radio.

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"AM (abbreviation for amplitude modulation)." The Columbia Encyclopedia, 6th ed.. . Retrieved October 23, 2017 from Encyclopedia.com: http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/am-abbreviation-amplitude-modulation

am

am see BE.

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"am." The Concise Oxford Dictionary of English Etymology. . Encyclopedia.com. 23 Oct. 2017 <http://www.encyclopedia.com>.

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"am." The Concise Oxford Dictionary of English Etymology. . Retrieved October 23, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/am-8

am

amam, Amsterdam, Assam, Bram, cam, cham, cheongsam, clam, cram, dam, damn, drachm, dram, exam, femme, flam, gam, glam, gram, ham, jam, jamb, lam, lamb, mam, mesdames, Omar Khayyám, Pam, pram, pro-am, ram, Sam, scam, scram, sham, Siam, slam, Spam, swam, tam, tram, Vietnam, wham, yam •in memoriam • ad nauseam •iamb, Priam •grandam • Edam • goddam •quondam • Potsdam • cofferdam •Rotterdam • Oxfam • Birmingham •Abraham • logjam • CAD-CAM •minicam • Nicam •Eelam, Elam •flimflam • oriflamme • Suriname •ad personam • diazepam • tangram •ashram • telegram • milligram •epigram • centigram • dithyramb •program, programme •cardiogram • radiogram • echogram •mammogram •aerogramme (US aerogram) •microgram • dirham •electrocardiogram • ideogram •heliogram • diaphragm • diagram •parallelogram • kilogram • hologram •encephalogram • anagram •monogram • sonogram • kissogram •pentagram • cryptogram • photogram •tam-tam • wigwam • whim-wham

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"am." Oxford Dictionary of Rhymes. . Encyclopedia.com. 23 Oct. 2017 <http://www.encyclopedia.com>.

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"am." Oxford Dictionary of Rhymes. . Retrieved October 23, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/am-4

am

am Physics, symbol for attometre(s)

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