Nitida

Nitida, Nitidum and Nitidus are forms of the Latin for "bright, shining, sleek, blooming, smart" and may refer to:

Nitida:
 * Nitida saga, a 14th-century Icelandic medieval poem

Nitidus:
 * Barbichthys nitidus, a junior synonym of B. laevis
 * Eleutherodactylus nitidus, a species of frog in the family Leptodactylidae
 * Emmelichthys nitidus, a rover species found at depths of between 100 and 500 m
 * Euryoryzomys nitidus, a rodent species in the genus Euryoryzomys of family Cricetidae
 * Hemicoelus nitidus, a species of beetles in the genus Hemicoelus of the family Anobiidae
 * Lichen nitidus, a chronic inflammatory disease of unknown etiology
 * Limnonectes nitidus, a species of frog in the family Ranidae
 * Liolaemus nitidus, known as the shining tree iguana is a species of lizard in the family Iguanidae
 * Nassarius nitidus, a species of sea snail, a marine gastropod mollusk in the family Nassariidae
 * Petalonyx nitidus, a species of flowering plant in the family Loasaceae known as shinyleaf sandpaper plant
 * Phymatodes nitidus, a species of longhorn beetle
 * Rhabdoblennius nitidus, a species of combtooth blenny found in coral reefs in the western Pacific Ocean
 * Sphoeroides nitidus, a species in the family Tetraodontidae, or pufferfishes
 * Stemonoporus nitidus, a species of plant in the family Dipterocarpaceae
 * Zonitoides nitidus, species of small, air-breathing land snail in the family Gastrodontidae

Nitidum
 * Leptospermum nitidum, the shining tea-tree, a shrub species endemic to Tasmania
 * Pisidium nitidum, the shining pea clam, a freshwater clam species
 * Strioterebrum nitidum, the shiny Pacific auger, a sea snail species
 * Zanthoxylum nitidum the shiny-leaf prickly-ash, a flowering plant species
 * Meioceras nitidum, a sea snail species