Skip to main content
Select Source:

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).

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"americium." World Encyclopedia. . Encyclopedia.com. 14 Dec. 2017 <http://www.encyclopedia.com>.

"americium." World Encyclopedia. . Encyclopedia.com. (December 14, 2017). http://www.encyclopedia.com/environment/encyclopedias-almanacs-transcripts-and-maps/americium

"americium." World Encyclopedia. . Retrieved December 14, 2017 from Encyclopedia.com: http://www.encyclopedia.com/environment/encyclopedias-almanacs-transcripts-and-maps/americium

AM

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

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"AM." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. 14 Dec. 2017 <http://www.encyclopedia.com>.

"AM." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. (December 14, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/am-5

"AM." The Oxford Pocket Dictionary of Current English. . Retrieved December 14, 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.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"am." The Concise Oxford Dictionary of Music. . Encyclopedia.com. 14 Dec. 2017 <http://www.encyclopedia.com>.

"am." The Concise Oxford Dictionary of Music. . Encyclopedia.com. (December 14, 2017). http://www.encyclopedia.com/arts/dictionaries-thesauruses-pictures-and-press-releases/am

"am." The Concise Oxford Dictionary of Music. . Retrieved December 14, 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.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"am." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. 14 Dec. 2017 <http://www.encyclopedia.com>.

"am." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. (December 14, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/am-7

"am." The Oxford Pocket Dictionary of Current English. . Retrieved December 14, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/am-7

Am

Am • symb. the chemical element americium.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"Am." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. 14 Dec. 2017 <http://www.encyclopedia.com>.

"Am." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. (December 14, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/am-6

"Am." The Oxford Pocket Dictionary of Current English. . Retrieved December 14, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/am-6

Am (chemical symbol)

Am, symbol for the element americium.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"Am (chemical symbol)." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. 14 Dec. 2017 <http://www.encyclopedia.com>.

"Am (chemical symbol)." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. (December 14, 2017). http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/am-chemical-symbol

"Am (chemical symbol)." The Columbia Encyclopedia, 6th ed.. . Retrieved December 14, 2017 from Encyclopedia.com: http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/am-chemical-symbol

AM

AM Abbreviation of amplitude modulation

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"AM." World Encyclopedia. . Encyclopedia.com. 14 Dec. 2017 <http://www.encyclopedia.com>.

"AM." World Encyclopedia. . Encyclopedia.com. (December 14, 2017). http://www.encyclopedia.com/environment/encyclopedias-almanacs-transcripts-and-maps/am

"AM." World Encyclopedia. . Retrieved December 14, 2017 from Encyclopedia.com: http://www.encyclopedia.com/environment/encyclopedias-almanacs-transcripts-and-maps/am

AM (abbreviation for amplitude modulation)

AM: see modulation; radio.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"AM (abbreviation for amplitude modulation)." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. 14 Dec. 2017 <http://www.encyclopedia.com>.

"AM (abbreviation for amplitude modulation)." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. (December 14, 2017). http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/am-abbreviation-amplitude-modulation

"AM (abbreviation for amplitude modulation)." The Columbia Encyclopedia, 6th ed.. . Retrieved December 14, 2017 from Encyclopedia.com: http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/am-abbreviation-amplitude-modulation

am

am see BE.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"am." The Concise Oxford Dictionary of English Etymology. . Encyclopedia.com. 14 Dec. 2017 <http://www.encyclopedia.com>.

"am." The Concise Oxford Dictionary of English Etymology. . Encyclopedia.com. (December 14, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/am-8

"am." The Concise Oxford Dictionary of English Etymology. . Retrieved December 14, 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

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"am." Oxford Dictionary of Rhymes. . Encyclopedia.com. 14 Dec. 2017 <http://www.encyclopedia.com>.

"am." Oxford Dictionary of Rhymes. . Encyclopedia.com. (December 14, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/am-4

"am." Oxford Dictionary of Rhymes. . Retrieved December 14, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/am-4

am

am Physics, symbol for attometre(s)

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"am." The Oxford Dictionary of Abbreviations. . Encyclopedia.com. 14 Dec. 2017 <http://www.encyclopedia.com>.

"am." The Oxford Dictionary of Abbreviations. . Encyclopedia.com. (December 14, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/am-1

"am." The Oxford Dictionary of Abbreviations. . Retrieved December 14, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/am-1