| Pediastrum, genus of disk-shaped colonial green algae, characterized by peripheral hornlike projections, comprising part of the freshwater plankton. |
| They feed by straining small marine organisms out of the water using plates of baleen, a hornlike substance that forms filaments that hang down from the roof of the mouth. |
| White pox has nearly wiped out hornlike elkhorn coral in some reefs in the Caribbean and elsewhere. |
| They are often found as crusts, coatings, or hornlike masses with native silver, wad, and limonite and are common in Germany, Chile, and the western United States. |
| Beautiful, that sleep-inducing hornlike crackling noise. |
| They bear hornlike structures on the head. |
