A class of lower plants that comprises the brown algae.
- ‘Phaeophyceae, or giant kelp, is a brown algae that is generally found in a costal, temperate, marine environment.’
- ‘For marine plants, the argument would be different if we accepted the limited overnight acid accumulation in the Phaeophyceae as CAM, in view of the large biomass production of kelp.’
- ‘There have been known several methods for preparing alginic acid or its alkali salts from the Phaeophyceae.’
Modern Latin (plural), from Greek phaios dusky + phukos seaweed.