Yttrium

имя существительное [химия] иттрий

Большой англо-русский словарь

Yttrium

иттрий, Y

Англо-русский политехнический словарь

Yttrium

noun Etymology: New Latin, from yttria yttrium oxide (Y2O3), irregular from Ytterby, town in southern Sweden a metallic element usually included in the rare-earth group that occurs usually with other rare earth elements in minerals and is used especially in phosphors, YAG lasers, and superalloys — see element table

Merriam-Webster's Collegiate Dictionary