1. the process of absorbing or taking in something, especially nutrients, gases, or substances by living organisms
Usage: often used in scientific contexts
2. the rate or amount at which something is absorbed or taken up
Usage: technical usage
3. vertical shafts or passages for carrying smoke, air, or gases upward
Usage: engineering; industrial contexts

Examples

• The plant’s uptakes of nitrogen increased after fertilization.
• Scientists measured the uptakes of carbon dioxide by the forest.
• The drug’s uptakes by brain cells were studied in the laboratory.
• Oxygen uptakes vary among different species of fish.
• The factory’s uptakes carried smoke high into the atmosphere.
• Engineers inspected the uptakes for any blockages or damage.