Appointment

an act of assigning job or position to someone.

Cross Section

Cross section means the representation of the intersection of an object by a plane along its axis. A cross-section is a shape that is yielded from a solid (eg. cone, cylinder, sphere) when cut by a plane.

Vertex

In geometry, a vertex (in plural form: vertices or vertexes) is a point where two or more curves, lines, or edges meet.

Library

A library is a collection of materials, books or media that are accessible for use and not just for display purposes.