mes|o|tho|ri|um

mes|o|tho|ri|um
mes|o|tho|ri|um «MEHS uh THR ee uhm, -THOHR-; MEHZ-», noun.
either of two radioactive isotopes, mesothorium I (at.no.: 88; half-life: 6.7 years), an isotope of radium, formed from thorium and yielding mesothorium II (at.no.: 89; half-life: 6.13 hours), an isotope of actinium. Both isotopes have an atomic weight of 228, and are intermediate between thorium and radiothorium.
[< meso- + thorium]

Useful english dictionary. 2012.

Игры ⚽ Нужно решить контрольную?

Look at other dictionaries:

  • mes|o|tho|rac|ic — «MEHS uh th RAS ihk, thoh ; MEE suh », adjective. of or having to do with the mesothorax of an insect …   Useful english dictionary

  • mes|o|tho|rax — «MEHS uh THR aks, THOHR ; MEE suh », noun, plural rax|es, ra|ces « ruh seez». the middle of the three divisions of the thorax of an insect, typically bearing the first pair of wings and the middle pair of legs. ╂[< meso + thorax] …   Useful english dictionary

  • mesothorax — mes•o•tho•rax [[t]ˌmɛz əˈθɔr æks, ˈθoʊr , ˌmɛs , ˌmi zə , sə [/t]] n. pl. tho•rax•es, tho•ra•ces [[t] ˈθɔr əˌsiz, ˈθoʊr [/t]] ent the middle segment of the three divisions of the thorax of an insect, bearing the second pair of legs and the first… …   From formal English to slang

  • mesothorium — [mes΄ōthôr′ē əm, mez΄ōthôr′ē əm] n. 〚ModL: see MESO & THORIUM〛 1. a radioactive isotope of radium (mesothorium 1), formed from thorium 2. a radioactive isotope of actinium (mesothorium 2) …   Universalium

  • Mesothoracic — Mes o*tho*rac ic, a. (Zo[ o]l.) Of or pertaining to the mesothorax. [1913 Webster] …   The Collaborative International Dictionary of English

  • Mesothorax — Mes o*tho rax, n. [Meso + thorax: cf. F. m[ e]sothorax.] (Zo[ o]l.) The middle segment of the thorax in insects. See Illust. of {Coleoptera}. [1913 Webster] …   The Collaborative International Dictionary of English

  • Mesothorium — Mes o*tho ri*um, n. [NL.; meso + thorium.] (Chem.) a radioactive isotope of radium (radium 228) with a half life of 5.8 years. Also called {mesothorium 1} or {mesothorium I} to distinguish it from a subsequent decay product, mesothorium II… …   The Collaborative International Dictionary of English

  • mesothorium I — Mesothorium Mes o*tho ri*um, n. [NL.; meso + thorium.] (Chem.) a radioactive isotope of radium (radium 228) with a half life of 5.8 years. Also called {mesothorium 1} or {mesothorium I} to distinguish it from a subsequent decay product,… …   The Collaborative International Dictionary of English

  • mesothorium-1 — Mesothorium Mes o*tho ri*um, n. [NL.; meso + thorium.] (Chem.) a radioactive isotope of radium (radium 228) with a half life of 5.8 years. Also called {mesothorium 1} or {mesothorium I} to distinguish it from a subsequent decay product,… …   The Collaborative International Dictionary of English

  • a — acar·a·pis; ac·a·ri·a·sis; ac·a·ri·a·sis; ac·a·ri·na; ac·a·ri·nar·i·um; ac·a·rine; ac·a·ri·nol·o·gy; ac·a·ri·no·sis; ac·a·ro·ce·cid·i·um; ac·a·roid; ac·a·rol·o·gist; ac·a·rol·o·gy; ac·a·ro·pho·bia; ac·a·rus; acat·a·lep·sy; acat·a·lex·is;… …   English syllables

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”