名詞 clef:

1. a musical notation written on a staff indicating the pitch of the notes following it

clef

n.Music （名詞）【音樂】
A symbol indicating the pitch represented by one line of a staff, in relation to which the other pitches of the staff can be determined.
譜號：一個標(biāo)明五線譜一行所代表的音高，由此五線譜的其它音高標(biāo)準(zhǔn)可以確定

來源：
French [key]
法語 [鍵]
from Old French
源自 古法語
from Latin cl3vis
源自 拉丁語 cl3vis