luminosity：光明，光辉；发光度；发光体

词根词缀： -lumin-光,照 + -osity名词词尾

• buy
• buzz
• buzzard
• bwana
• by
• by-
• bye
• bygone
• by hook or by crook
• by-law
• byline
• bypass
• by-pass
• byproduct
• by-product
• byre
• bystander
• byte
• Byzantine
• C
• cab
• cabal
• Cabala
• cabaret
• cabbage