vacu- +

Any spaces or cavities within a cell.

They may function in digestion, storage, secretion, or excretion.

1. An instrument for the comparison of barometers.
2. An apparatus for the measurement of low pressures.

1. Devoid of matter; empty; vacant, blank, void.
2. Lacking intelligence; stupid; a vacuous remark is one that is empty of intelligence.
3. Devoid of substance or meaning; inane.
4. Devoid of expression; vacant.

In a vacuous manner.

1. A total absence of matter.
2. The state of being empty.

1. Absence of matter; a space empty of matter or relatively empty of matter.
2. A space in which the pressure is significantly lower than atmospheric pressure.
3. A state of emptiness; a void.
4. A state of being sealed off from external or environmental influences; isolation.
5. Relating to, or used to create a vacuum.
6. Containing air or other gas at a reduced pressure.
7. Operating by means of suction or by maintaining a partial vacuum.
8. To use a vacuum cleaner on; clean with a vacuum cleaner: to vacuum rugs.
9. To treat with any vacuum device; such as, a vacuum drier.