also lanthanoid noun Etymology: International Scientific Vocabulary Date: 1926 any of the series of elements with increasing atomic numbers that begins with lanthanum or cerium and ends with lutetium
LANTHANIDE
Meaning of LANTHANIDE in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012