Dictionary > Pinion


(Science: zoology) A moth of the genus Lithophane, as L. Antennata, whose larva bores large holes in young peaches and apples.
1. A feather; a quill.
2. A wing, literal or figurative. Swift on his sooty pinions flits the gnome. (pope)
3. The joint of bird’s wing most remote from the body.
4. A fetter for the arm.
5. (Science: mechanics) A cogwheel with a small number of teeth, or leaves, adapted to engage with a larger wheel, or rack (see Rack); especially, such a wheel having its leaves formed of the substance of the arbor or spindle which is its axis. Lantern pinion. See Lantern. Pinion wire, wire fluted longitudinally, for making the pinions of clocks and watches. It is formed by being drawn through holes of the shape required for the leaves or teeth of the pinions.
Origin: OF. Pignon a pen, F, gable, pinion (in sense 5); cf. Sp. Pinon pinion; fr. L. Pinna pinnacle, feather, wing. See Pin a peg, and cf. Pen a feather, Pennat, Pennon.

You will also like...

Physical growth
Physical Development in Humans

This tutorial elaborates on the physical development of humans, particularly from puberty to adulthood. Read this tutori..

running freshwater community
Running Water Freshwater Community Factors

This tutorial noted some of the physical and chemical factors that provide the framework of a running water community in..

Community Patterns

Learn about community patterns and the ecological factors influencing these patterns. Revisit some of the ecosystems you..

Cells in different stages of meiosis
Meiosis – The Genetics of Reproduction

Meiosis is a form of cell division that creates gametes. It is comprised of two divisions that in the end, the resulting..

The Human Physiology
The Human Physiology

Physiology is the study of how living organisms function. Thus, human physiology deals specifically with the physiologic..

Still freshwater and plants
Still Freshwater & Plants

Plants in lentic habitats have features not found in terrestrial plants. They acquired these features as they adapt to t..