double-tongue

(-tuŋ′)

to alternate quickly and regularly the use of the tip and base of the tongue in playing a flute, trumpet, etc. to facilitate rapid articulation

See double-tongue in American Heritage Dictionary 4

intransitive verb dou·ble-tongued, dou·ble-tongu·ing, dou·ble-tongues

To play a rapidly repeated series of notes on a wind instrument by placing the tongue alternately between the positions for t and k.

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