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lanthanum
(redirected from Element 57)

    Also found in: Encyclopedia, Wikipedia, Hutchinson 0.01 sec.
lanthanum /lan·tha·num/ (La) (lan´thah-num) a chemical element, at. no. 57.
lan·tha·num (lnth-nm)
n. Symbol La
A soft malleable metallic rare-earth element used in glass manufacture. Atomic number 57.
lanthanum
a chemical element, atomic number 57, atomic weight 138.91, symbol La. See Table 6.


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