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nock (equipment) – The notch at the rear end of an arrow; also the notches at the ends of the bow limbs to which the bowstring is attached, or looped over; nock (practice) – The act of setting an arrow in a bow; nocking point (equipment) – The point on a bow string over which an arrow nock is placed
A small, freely-moving projection on the anterior edge of the wing of modern birds (and a few non-avian dinosaurs)—a bird's "thumb"—the word is Latin and means 'winglet'; it is the diminutive of ala, meaning 'wing'. Alula typically bear three to five small flight feathers, with the exact number depending on the species.
Bicycle frame in steel tube, notched at the joints before TIG welding or brazing. Tube notching is commonly performed before joining light-gauge tubes to make a tee or similar joint, as by welding. Either one or both tubes may be notched before assembly. A familiar example of tube notching is in the manufacture of bicycle frames.
Diagram of a crenated leaf. Crenation (from modern Latin crenatus meaning "scalloped or notched", from popular Latin crena meaning "notch") [1] in botany and zoology, describes an object's shape, especially a leaf or shell, as being round-toothed or having a scalloped edge.
The stick is notched and inscribed to record a debt owed to the rural dean of Preston Candover, Hampshire, of a tithe of 20d each on 32 sheep, amounting to a total sum of £2 13s. 4d. A tally stick (or simply a tally [ 1 ] ) was an ancient memory aid used to record and document numbers, quantities, and messages.
Notch signalling pathway, a cell signalling system present in most multicellular organisms; Notch proteins, a family of transmembrane proteins; Notch filter, a band-stop filter with a narrow stopband; Notch test, also known as Charpy impact test; Lion Notch, a male lion featured in the nature documentary series Big Cat Diary
For all notch types, a key parameter in governing stress concentration and failure in notched materials is the notch tip curvature or radius. [ 1 ] Sharp tipped V-shaped notches are often used in standard fracture toughness testing for ductile materials, polymers and for the characterization of weld strength.
The three-box, notchback design of the Fiat 124 Coupé A three-box liftback in notchback form—with its vestigial third box, the European Ford Escort. A notchback is a car design with the rear section distinct from the passenger compartment and where the back of the passenger compartment is at an angle to the top of what is typically the rear baggage compartment. [1]