(algebra) A theorem which states that for each element of a given set that a given group acts on, there is a natural bijection between the orbit of that element and the cosets of the stabilizer subgroup with respect to that element.

(grammar) A word used to represent an ordinal number.

(music) barrel organ

(science fiction) A satellite or space station, found in many different works of science fiction, meant to defend a planet against attack from space.

An ornamental screen on which a secondary organ is sometimes placed in cathedrals.

plural of organ screen

(music) A reed organ having a graduated set of vibrators or free reeds connected by rods which cause the vibration of corresponding wires or strings stretched over a sounding board.

plural of red-legged golden orb-weaver spider

The spider Nephila inaurata

(music) An orchestra that plays popular music and show tunes as well as well-known classical works.