thulium

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thulium

 [thoo´le-um]
a chemical element, atomic number 69, atomic weight 168.934, symbol Tm. (See Appendix 6.)

thu·li·um (Tm),

(thū'lē-ŭm),
A metallic element of the lanthanide series, atomic no. 69, atomic wt. l68.93421.
[L. Thule, the earliest name for Scandinavia]

thulium

/thu·li·um/ (thoo´le-um) chemical element, at. no. 69, symbol Tm.

thulium (Tm)

[tho̅o̅′lē·əm]
Etymology: L, Thule, northern island
a rare earth metallic element. Its atomic number is 69; its atomic mass is 168.93. Thulium that has been irradiated in a nuclear reactor gives off gamma radiation.

thu·li·um

(thū'lē-ŭm)
A metallic element of the lanthanide series, atomic no. 69, atomic wt. l68.93421.
[L. Thule, the earliest name for Scandinavia]

thulium

a chemical element, atomic number 69, atomic weight 168.934, symbol Tm. See Table 6.