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Webster 1913 Edition

Adj.

[Pref.

retro-

+ L.

pellere

pulsum

, to impel.]

Driving back; repelling.

Adj.

[L. retro, back, and pulsus, pello, to drive.] Driving back; repelling.

retropulsive ‎(comparative more retropulsive, superlative most retropulsive)