depressor
noun /dɪˈpresə(r)/
/dɪˈpresər/
- an instrument for pressing something down
see also tongue depressor降压器:一种压下东西的工具 词源early 17th cent. (in the general sense ‘someone or something that depresses’): from Latin, from depress- ‘pressed down’, from the verb deprimere ‘press down’.