Lexic.us

Definition of Thulium

1. Noun. A soft silvery metallic element of the rare earth group; isotope 170 emits X-rays and is used in small portable X-ray machines; it occurs in monazite and apatite and xenotime.

Definition of Thulium

1. n. A rare metallic element of uncertain properties and identity, said to have been found in the mineral gadolinite.

Definition of Thulium

1. Noun. a metallic chemical element (''symbol'' Tm) with an atomic number of 69. ¹

¹ Source: wiktionary.com

Definition of Thulium

1. a metallic element [n -S]

Medical Definition of Thulium

1. A rare metallic element of uncertain properties and identity, said to have been found in the mineral gadolinite. Origin: NL. See Thule. Source: Websters Dictionary (01 Mar 1998)

Lexicographical Neighbors of Thulium

Literary usage of Thulium

Below you will find example usage of this term as found in modern and/or classical literature:

1. A Treatise on Chemistry by Henry Enfield Roscoe, John Cannell Cain, Carl Schorlemmer (1913)
"DYSPROSIUM. Dy = 162-5. HOLMIUM. Ho =163-5. ERBIUM. Er =167-7. thulium. ... is an individual substance.6 thulium, according to Auer von Welsbach,6 consists ..."

2. The Metals of the Rare Earths by James Frederick Spencer (1919)
"thulium, Tm. At. Wt. 168-5. It seems probable that the material which has been regarded as thulium is, in reality, complex. ..."

3. Proceedings of the American Pharmaceutical Association at the Annual Meeting by American Pharmaceutical Association, National Pharmaceutical Convention (1912)
"thulium—Recent Research Regarding its Nature and Compounds.— thulium, which was discovered by Cleve in 1879 (see Proceedings, 1880, 257) while trying to ..."

4. The Chemical News and Journal of Industrial Science (1908)
"The thulium red is also very strong, and the band in the blue has made its appearance, ... Further on still the thulium band in the red shows itself, ..."

5. Inorganic Chemistry: With the Elements of Physical and Theoretical Chemistry by John Iredelle Dillard Hinds (1908)
"thulium 171. FLUORIN, chlorin, bromin, and iodin constitute a group of closely allied elements called halogens (Greek, unit-makers), because all their ..."

6. Inorganic Chemistry: With the Elements of Physical and Theoretical Chemistry by John Iredelle Dillard Hinds (1905)
"... metals (Group IA), called haloid salts, have a close resemblance to common salt, NaCL The rare element thulium is provisionally placed in this group. ..."

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