an accent (~) placed over Spanish n when pronounced ny (as in señor) or Portuguese a or o when nasalized (as in São Paulo), or over a vowel in phonetic transcription, indicating nasalization (西班牙语中的)腭化符号(即~);(葡萄牙语中的)鼻音化符号(即~) ■a similar symbol used in mathematics and logic to indicate negation, inversion, etc (数学或逻辑学中的)否定符号(即~) .
语源
mid 19th cent.: from Spanish, based on Latin titulus (see title)