释义（英文）
名词 Noun
- Initialism of part number.
- (medicine) Abbreviation of practical nurse.
- Initialism of proportional navigation.
- (linguistics) Abbreviation of proper noun.
名词 Noun
- (astronomy) Initialism of planetary nebula.
专有名词 Proper noun
- (Malaysia, politics, uncountable) initialism of Perikatan Nasional (“National Alliance”)