Tremor \Tre"mor\, n. [L., from tremere to tremble. See Tremble, v.]

A trembling; a shivering or shaking; a quivering or vibratory motion; as, the tremor of a person who is weak, infirm, or old.

He fell into an universal tremor of all his joints. --Harvey.

Source: Webster's Revised Unabridged Dictionary (1913)