Rallentando

from WordNet (r) 3.0 (2006)

rallentando
    adv 1: slowing down; "this passage should be played rallentando"
    adj 1: gradually decreasing in tempo [syn: {rallentando},
           {ritardando}, {ritenuto}, {rit.}]

from The Collaborative International Dictionary of English v.0.48

Rallentando \Ral`len*tan"do\ (r[aum]l`l[e^]n*t[aum]n"d[-o]), a.
   [It.] (Mus.)
   Slackening; -- a direction to perform a passage with a
   gradual decrease in time and force; ritardando.
   [1913 Webster]

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