镧系元素

lanthanoid (rare earth series), namely: lanthanum La57 鑭|镧[lan2], cerium Ce58 鈰|铈[shi4], praseodymium Pr59 鐠|镨[pu3], neodymium Nd60 釹|钕[nü3], promethium Pm61 鉕|钷[po3], samarium Sm62 釤|钐[shan1], europium Eu63 銪|铕[you3], gadolinium Gd64 釓|钆[ga2], terbium Tb65 鋱|铽[te4], dysprosium Dy66 鏑|镝[di1], holmium Ho67 鈥|钬[huo3], erbium Er68 鉺|铒[er3], thulium Tm69 銩|铥[diu1], ytterbium Yb70 鐿|镱[yi4], lutetium Lu71 鑥|镥[lu3]

lanthanum (chemistry)

to connect / to relate to / to tie up / to bind / to be (literary)

system / department / faculty

to tie / to fasten / to button up

to connect / to arrest / to worry

surname Yuan / the Yuan or Mongol dynasty (1279-1368)

currency unit (esp. Chinese yuan) / first / original / primary / fundamental / constituent / part / era (of a reign) / meta- (prefix) / (math.) argument / variable / (Tw) (geology) eon

element / element of a set / chemical element

element (key component of sth) / (chemistry) element / (math.) element (member of a set)

raw silk / white / plain, unadorned / vegetarian (food) / essence / nature / element / constituent / usually / always / ever