Rallentando a. : Slackening; -- a direction to perform a passage with a gradual decrease in time and force; ritardando.

Example:


Taxonomy
tempo, tempo markings, allegro, markings, movement, indications, mood, metronome, composers, bpm, Italian, tempo change, andante, composition, languages, adagio, metronome marking, tempo indication.

Defination from the web:
Rallentando) Jump to: navigation, search. For other uses, see Tempo (disambiguation) ... Rallentando — gradual slowing down (abbreviation: rall.) Ritardando — immediate slowing down (abbreviation: rit. or more specifically, ritard. ...