Khí-keng (ha̍k-miâ Odontoceti) sī Cetacea ba̍k ē-kha ê a-ba̍k, sêng-oân pau-koah só͘-ū ê hái-ti kap pō͘-hūn ê hái-ang. In hām Mysticeti a-ba̍k ê chéng chha tī ū chhùi-khí bô keng-chhiu. In-ūi án-ne, khí-keng sī chek-ke̍k lia̍h-chia̍h ê tōng-bu̍t, bo̍k-phiau pau-koah hî-á, ba̍k-cha̍t, ū sî-chūn sīm-chì hái--ni̍h kî-thaⁿ ê chhī-leng tōng-bu̍t.
