麟角鳳觜 [ㄌㄧㄣˊ ㄐㄧㄠˇ ㄈㄥˋ ㄗㄨㄟˇ; lin2 jiao3 feng4 zui3] lit. qilin's horn, phoenix's mouth (idiom) fig. rara avis rarity ◄ ►