lanthanide
N ชื่อ ธาตุช นิดหนึ่ง
lanthanide series
N กลุ่ม ธาตุ หายาก klum-tad-ha-yak
lan tha nide |ˈlanTHəˌnīd ˈlænθənaɪd | ▶noun Chemistry any of the series of fifteen metallic elements from lanthanum to lutetium in the periodic table. See also rare earth. ORIGIN 1920s: from lanthanum + -ide .
lanthanide |ˈlanθənʌɪd | ▶noun Chemistry any of the series of fifteen metallic elements from lanthanum to lutetium in the periodic table (atomic numbers 57 –71 ). See also rare earth. ORIGIN 1920s: from lanthanum + -ide .