| A | B |
| kakapo | n. pl. A ground-dwelling New Zealand parrot with greenish plumage. |
| karakul, caracul | n. 1. Any of a breed of Central Asian sheep having a wide tail and wool that is curled and glossy in the young but wiry and coarse in the adult. 2. Fur made from the pelt of a karakul lamb. Also called broadtail. |
| kerseymere | n. A fine woolen cloth with a fancey twill weave. |
| khanate | n . 1. The realm of a khan. 2. The position of a khan. Nor origin given. |
| kobold | n. 1. An often mischievous household elf in German folklore. 2. A gnome that haunts underground places in German folklore. |
| lentando | adv. adj. Music. Slowing gradually. Used chiefly as a direction. |
| liptropism | adj. 1. Preventing abnormal or excessive accumulation of fat in the liver. 2. Having an affinity for lipids. lipotropy, lipotropism n. No origin given. |
| llanos plural of llano | n. pl. A large, grassy, almost treeless plain, especially one in Latin America. |
| loess | n. A buff to gray windblown deposit of fine-grained, calcareous silt or clay. |
| lordosis | An abnormal forward curvature of the spine in the lumbar region. |
| ludic | adj. Of, relating to, or connoting play or playfulness. |