| KOH | a cosmetic preparation used by women in Egypt and Arabia to darken the edges of their eyelids |
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| KOH | shrubby herb cultivated for their soft velvety foliage and showy scarlet flowers |
| KOH | fleshy turnip-shaped edible stem of the kohlrabi plant |
| KOH | plant cultivated for its enlarged fleshy turnip-shaped edible stem |