تلفظ بین المللی : /kəʊldˈɒlədʒi/ تلفظ : [koUld'0l@dZi]
English
A treatise on the bile and bilary organs.
A rare metallic element of the boron-aluminium group, found in gadolinite and other rare minerals, and extracted as a dark gray powder. Symbol Y. Atomic weight, 89. [Written also ittrium.] Note: Associated with yttrium are certain rare elements, as erbium, ytterbium, samarium, etc., which are separated in a pure state with great difficulty. They are ...
