Wing
A hawk with wings extended
Blackbird wing
A wing was an appendage typically designed for flight. In nature, several varieties of animal bore wings, including birds, bats, and many insects. Wings, usually bird wings, were additionally prepared as food. Wings featured in many cultures' artistic depictions, sometimes as metaphor, and in mythology.
In Nature
All creatures of the planet Areolus possessed wings, including the Areore and the Sky snake. (LD: "A Mathematically Perfect Redemption")
Odo, a Changeling, had the ability to change his shape to virtually any creature or object. One of the first creatures he took the form of after meeting his people in 2371 was an Arbazan vulture, and experienced the feeling of air currents beneath his wings as he soared above the treetops. (DS9: "The Search, Part II")
Chakotay's medicine bundle included an Earth blackbird's wing. The wings of Earth's vampire bat were also of notable shape, once observed by Harry Kim in the cloud formation of a Class J nebula in 2376. (VOY: "The Cloud", "The Haunting of Deck Twelve")
According to a Kromsapiod named K'ranch, there were three types of prey, the third type being a winged lizard-type creature. (LD: "The Least Dangerous Game")
In 2257, the Red Angel was a unique winged creature, with no similarities to any other winged or avian lifeforms either in the United Federation of Planets or the whole known universe. (DIS: "An Obol for Charon")
The some creatures of Rhymus Major had wings, including the flitterbird, whose whings made a whispering sound, and the Mordian butterfly. During Natima Lang's work on Deep Space 9 in 2363, she and Quark participated in a holosuite program wherein one of these butterflies got stuck on her nose and beat his wings rapidly in attempt to get escape. (DS9: "Profit and Loss")
Confronting the Suliban Silik about his motives for helping them in 2151, Captain Archer asked what genetic enhancements he'd receive in payment, suggesting a pair of wings. (ENT: "Cold Front")
As a child, Guinan had an imaginary friend that was a Tarcassian razor beast. According to her, razor beasts "had dark brown fur and gold eyes and huge spiny wings, and it would fly so fast nobody could see it..." (TNG: "Imaginary Friend")
The species to which Ensign Vilix'pran belonged had hatchlings whose wings would get tangled together if left unsupervised. (DS9: "Business as Usual")
In Art
An Akaali statue missing one wing
Wings were part of statues and sculptures on different planets such as Angel I, Aldea, and Earth. (TNG: "Angel One", "When The Bough Breaks", "We'll Always Have Paris") A curio shop on the Akaali homeworld in 2151 featured statues of winged creatures. (ENT: "Civilization") Arctus Baran also owned a winged statue aboard his ship in 2370. (TNG: "Gambit, Part II") Also that year, visiting the clay school class for children on the USS Enterprise-D, Counselor Deanna Troi advised Eric Burton the wings on his statue were a fine size, as birds have a variety of wing sizes. (TNG: "Masks")
Earth had many mythological creatures with wings, including pixies and the Maya legend of a winged serpent god who brought knowledge from the sky. Greek mythology included the story of Daedalus, a man who built wings from wax for him and his son to escape prison. His son Icarus flew too close to the sun, melting his wings and causing him to plunge from the sky. (TAS: "How Sharper Than a Serpent's Tooth", VOY: "Spirit Folk", "Alice")
After an engineering accident in 2369, Data began to experience visions which inspired him to paint to try to make sense of them. As he painted what he saw in the vision, he painted smoke, despite not having seen smoke in his vision, which he realized was a bird's wing. (TNG: "Birthright, Part I")
The love sonnet "The Nightingale Woman," written in 1996 by Phineas Tarbolde of Canopus Planet, included the line, "My love has wings, slender feathered things with grace in upswept curve and tapered tip." (TOS: "Where No Man Has Gone Before")
Vulcan metaphorical use of "wings" included their history, which used the phrase "those who marched beneath the raptor's wings" for those who wanted to return to their savage ways before the teachings of Surak took hold. (ENT: "The Forge") In 2152, the former Vulcan operative Menos would say that the reports generated about him by the Security Directorate were so exaggerated that he would be able to sprout wings and fly away if they were true. (ENT: "The Seventh")
In 2267, Apollo explained a number of Greek gods including Hera had "returned to the cosmos on the wings of the wind," meaning they literally "spread [themselves] upon the wind, thinner and thinner, until only the wind remained." (TOS: "Who Mourns for Adonais?")
In 2266, under the influence of polywater intoxication, Lieutenant junior grade Joe Tormolen stated that "if a man was supposed to fly, he'd have wings." (TOS: "The Naked Time") Captain James T. Kirk would quote the same cliché in 2268 when asked to serve as a vessel for an Arretan named Sargon. (TOS: "Return to Tomorrow")
In 2375, Jack, Lauren, and Patrick recalibrated the imaging diodes on Deep Space 9 with such accuracy that one could metaphorically "clip the wings of an angel dancing on the head of a pin." (DS9: "Chrysalis")
Earth cuisine featured wings, along with drumsticks and thighs, as pieces of birds that could be eaten. (ENT: "Desert Crossing") Spicy Paraka wings were considered a suitable party food at the Talaxian Paxau Resort. (VOY: "Warlord")
In Aircraft
Wings were key components allowing fixed-wing aircraft to achieve flight, constructed based on observation of natural occurrences of the appendage. Loss of wings could be debilitating to such vessels.
On Earth, the inventor Leonardo da Vinci created plans for a flying machine called the Great Bird in antiquity. Kathryn Janeway participated in a holographic program depicting the machine in 2374. The wing's length was extended, position made stationary, and material exchanged for duranium alloy as part of the program. (VOY: "Concerning Flight")
Coridan aircraft of the 22nd century were fixed-wing aircraft. (ENT: "Shadows of P'Jem")
The wings of a Klingon Bird-of-Prey were adjustable by degrees. At full impulse, the wings were in cruise configuration. (Star Trek IV: The Voyage Home)
Cameras affixed to the wings of an aircraft were called wing cameras. (TOS: "Tomorrow is Yesterday")
When Travis Mayweather and Malcolm Reed attempted to reach the surface of Vulcan in 2154, their shuttlepod lost part of the starboard wing and was forced to return to the Enterprise NX-01. (ENT: "Awakening")
In 2378, the broken wing of a class 2 shuttle Seven of Nine and Tuvok were travelling with was detected on the energy barrier surrounding an area of Ledos. (VOY: "Natural Law")
"Wings" could also be used to describe extensions of an object or objects, sometimes in flight, such as an attack wing as part of a larger fleet of vessels. In 2368, attempting to perform a Kolvoord Starburst maneuver with four other cadets, Wesley Crusher was on the "right wing" of the formation. (TNG: "The First Duty")