Any of an order (Rajiformes) of usually marine cartilaginous fishes (as stingrays and skates) having the body flattened dorsoventrally, the eyes on the upper surface, and enlarged pectoral fins fused with the head
Cartilaginous fishes having horizontally flattened bodies and enlarged winglike pectoral fins with gills on the underside; most swim by moving the pectoral fins.
Any of several orders (especially Ragiformes) of cartilaginous fishes with a flattened body, winglike pectoral fins, and a whiplike tail.
Species include the stingray, for example the Southern stingray Dasyatis americana, which has a serrated, poisonous spine on the tail, and the torpedo fish.
1. (Mathematics) A straight line extending from a point.
2. A branch of an umbel or an umbelliform inflorescence.
3. Any of the stiff bony rods in the fin of a fish.
4. A thin line suggesting a ray: as any of a group of lines diverging from a common center; half line.
5. Particle, trace.
Zračak, luč, mali trak, tračić.
Trak svetlosti, linija po kojoj se prostire svetlost.