metallicity
/ˌmetəˈlɪsətɪ/noun
(pl. -ies)［mass noun］
1- the property of being metallic金属性, 金属特征。
1.1
- Astronomy the proportion of the material of a star or other celestial object that is an element other than hydrogen or helium【天文】（星球或其他天体）金属度。