NumberOfEdges (Polytopes Package Symbol)

NumberOfEdges[polytope] gives the number of edges of polytope.

NumberOfFaces (Polytopes Package Symbol)

NumberOfFaces[polytope] gives the number of faces of polytope.

NumberOfVertices (Polytopes Package Symbol)

NumberOfVertices[polytope] gives the number of vertices of polytope.

Deuterium (Resonance Absorption Lines Package Symbol)

Deuterium is an isotope of hydrogen.

CollisionFrequency (Standard Atmosphere Package Symbol)

CollisionFrequency[altitude] gives the collision frequency at the specified altitude altitude.

KineticTemperature (Standard Atmosphere Package Symbol)

KineticTemperature[altitude] gives the kinetic temperature at the specified altitude altitude.

ArcMinute (Units Package Symbol)

ArcMinute is a unit multiplier.

ArcSecond (Units Package Symbol)

ArcSecond is a unit multiplier.

ChevalVapeur (Units Package Symbol)

ChevalVapeur is a unit of power.

Diopter (Units Package Symbol)

Diopter is a unit of inverse length.