any chemical element in the group of elements that have the atomic numbers 57 to 71 in the periodic table

]]>https://definedictionarymeaning.com/topic/265808/lanthanideRSS for NodeThu, 04 Jun 2026 02:58:05 GMTTue, 15 Feb 2022 15:27:05 GMT60Any of the series of fifteen metallic elements from lanthanum to lutetium in the periodic table.

]]>https://definedictionarymeaning.com/post/454558https://definedictionarymeaning.com/post/454558Tue, 15 Feb 2022 15:44:09 GMT