острица

Etymology 1
. Equivalent to.

Noun

 * 1)  sedge graminoid flowering plant from family, known for its sharp leaves
 * 2)  true sedge of genus Carex
 * 1)  true sedge of genus Carex

Etymology 2
, probably a calque of the scientific name for the family. Morphologically equivalent to Etymology 1.

Noun

 * 1)  pinworm parasitic roundworm of genus or more generally of family
 * 2)  enterobiasis disease caused by infection with pinworms

Etymology 3
Similar to the other etymologies, apparently in reference to the spiky frame of the fish (which is also reflected in the other names for the species).

Noun

 * 1)   common perch freshwater fish of genus

Noun

 * 1) blade

Noun

 * 1) pinworm