high-graded1
/ˌhʌɪˈɡreɪdɪd/ /ˈhʌɪɡreɪdɪd/adjective
= high-grade.
Origin
Mid 19th century; earliest use found in Farmer's Monthly Visitor. From high + grade + -ed.
high-graded2
/ˈhʌɪɡreɪdɪd/North American Mining
adjective
Designating ore, especially high-grade gold ore, which has been stolen from a mine. Now historical.
Origin
1930s; earliest use found in Nevada State Journal. From high-grade + -ed.