'Darter' definitions:

Definition of 'darter'

noun

Fish-eating bird of warm inland waters having a long flexible neck and slender sharp-pointed bill [syn: snakebird, anhinga, darter]

noun

A person or other animal that moves abruptly and rapidly; "squirrels are darters"

From: GCIDE

Darter \Dart"er\, n.
1. One who darts, or who throw darts; that which darts. [1913 Webster]
2. (Zool.) The snakebird, a water bird of the genus Plotus; -- so called because it darts out its long, snakelike neck at its prey. See Snakebird. [1913 Webster]
3. (Zool.) A small fresh-water etheostomoid fish. The group includes numerous genera and species, all of them American. See Etheostomoid. [1913 Webster]

From: GCIDE

Snakebird \Snake"bird`\, n. [So named from its snakelike neck.] (Zool.)
1. Any one of four species of aquatic birds of the genus Anhinga or Plotus. They are allied to the gannets and cormorants, but have very long, slender, flexible necks, and sharp bills. [1913 Webster]
Note: The American species (Anhinga anhinga syn. {Plotus anhinga}) inhabits the Southern United States and tropical America; -- called also darter, and {water turkey}. The Asiatic species (Anhinga melanogaster) is native of Southern Asia and the East Indies. Two other species inhabit Africa and Australia respectively. [1913 Webster]
2. (Zool.) The wryneck. [1913 Webster]

From: GCIDE

Etheostomoid \E`the*os"to*moid\, a. [NL. etheostoma name of a genus + -oid.] (Zo["o]l.) Pertaining to, or like, the genus Etheostoma. -- n. Any fish of the genus Etheostoma and related genera, allied to the perches; -- also called darter. The etheostomoids are small and often bright-colored fishes inhabiting the fresh waters of North America. About seventy species are known, including the rare snail darter (Percina tanasi), 3 inches long, found only in the Tennessee River and classified as a threatened species. See Darter. [1913 Webster]