a. [f. as prec. + -ORY2.] Of, pertaining to, or characterized by trepidation or tremor.

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1881.  G. F. Rodwell, in Knowledge, 16 Dec., 130/2. The most severe shock lasted for 70 seconds, and combined oscillatory, trepidatory, and rotatory movement.

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1890.  W. O’Brien, When we were Boys, 191. ‘You are joking,’ he said, in the trepidatory tone of one who had just heard the last Trumpet was about to sound.

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