B

Burndown Chart

Graphical representation of the remaining work to do for a given period, updated as often as possible.

R

Release

Usually, the term "Release" defines the period of time from the start of a version development to its release, going through a series of successive sprints.

S

Sprint

A sprint is a Timebox leading to create a product increment. It's the Scrum term for "iteration".

T

Theme

A theme defines a functional group of requirements.

Timebox

A period of time with a fixed and unmovable end date even if all objectives aren't reached.

V

Velocity

Velocity is the measurement of team's production during a sprint.