TREM'ULOUS, adjective [Latin tremulus, from tremo, to tremble.] 1. Trembling; affected with fear or timidity; as a trembling christian. 2. Shaking; shivering; quivering; as a tremulous limb; a tremulous motion of the hand or the lips; the tremulous leaf of the poplar.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI