from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An immensely long, blackish seaweed of the Pacific (Macrocystis pyrifera), having numerous almond-shaped air vessels.
from the GNU version of the Collaborative International Dictionary of English
- n. An immensely long blackish seaweed of the Pacific (Macrocystis pyrifera), having numerous almond-shaped air vessels.
from The Century Dictionary and Cyclopedia
- n. A monotypic genus of gigantic seaweeds belonging to the Laminariaceæ.
Sorry, no etymologies found.
For example, the largest, fastest growing species in Phaeophyceae, macrocystis pyrifera, starts when spore producing sporophytes kind of the plant produce spores which are either female or male gametophytes.