trem·or 
(trĕmər)
(trĕmər)n.
1. A shaking or vibrating movement, as of the earth.
2. An involuntary trembling or quivering, as of the hands.
3. A state or feeling of nervousness, worry, or excitement: The news sent tremors through the stock market.
4. A tremulous sound; a quaver: a tremor in her voice.
[Middle English, terror, from Old French, from Latin, a trembling, from tremere, to tremble.]
- primarily
- primary
- primary accent
- primary atypical pneumonia
- primary biliary cirrhosis
- primary care
- primary cell
- primary coil
- primary color
- primary consumer
- primary election
- primary growth
- primary meristem
- primary root
- primary school
- primary stress
- primary structure
- primary succession
- primary syphilis
- primary tissue
- primary tooth
- primary verb
- primary xylem
- primate
- primatial