variant of 嘴[zui3]

number 20 of the 28 constellations 二十八宿, approx. Orion 獵戶座|猎户座

number 20 of the 28 constellations 二十八宿, approx. Orion 獵戶座|猎户座

lit. qilin's horn, phoenix's mouth (idiom); fig. rara avis; rarity