noun
- plural of spirogyra; green freshwater algae characterized by spiral-shaped chloroplasts
Usage: biology; botany
Examples
- The pond was covered with thick mats of spirogyras.
- Students examined spirogyras under the microscope in biology class.
- Spirogyras are commonly found in slow-moving freshwater streams.
- The distinctive spiral chloroplasts make spirogyras easy to identify.
- Fish often feed on spirogyras and other aquatic algae.
- Spirogyras can form dense green blankets on the water surface.