| CER | highly venomous viper of North Africa and southwest Asia having a horny spine above each eye |
|---|---|
| CER | highly venomous viper of North Africa and southwest Asia having a horny spine above each eye |
| CER | mouse-eared chickweed |
| CER | widespread in Arctic and on mountains in Europe |
| CER | densely tufted perennial chickweed of north temperate zone |
| CER | chickweed with hairy silver-gray leaves and rather large white flowers |
| CER | a hard medicated paste made of lard or oil mixed with wax or resin |
| CER | a fibrous scleroprotein that occurs in the outer layer of the skin and in horny tissues such as hair feathers nails and hooves |
| CER | Mediterranean fruit flies |
| CER | small black-and-white fly that damages citrus and other fruits by implanting eggs that hatch inside the fruit |
| CER | lungfishes having hornlike ridges on the teeth |
| CER | extinct lungfish |