| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
| a chattering or flighty, light-headed person. |
naiad (ˈnaɪæd) ![]() | |
| —n , pl -ads, -ades | |
| 1. | Greek myth a nymph dwelling in a lake, river, spring, or fountain |
| 2. | the aquatic larva of the dragonfly, mayfly, and related insects |
| 3. | Also called: water nymph any monocotyledonous submerged aquatic plant of the genus Naias (or Najas), having narrow leaves and small flowers: family Naiadaceae (or Najadaceae) |
| 4. | See mussel any of certain freshwater mussels of the genus Unio |
| [C17: via Latin from Greek nāias water nymph; related to náein to flow] | |