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Monterey Bay Aquarium Research Institute
Marine Botany




  • nemathecium - wart-like structure bearing reproductive parts
  • nanoplankton - plankton from 2 to 20 microns in diameter that would pass through the mesh of a normal plankton net
  • nematocyst - complex ejectile organellee produced in a new dinoflagellate genera
  • neritic - living in coastal ocean waters
  • neuston - organisms that live at the ocean-atmosphere interface
  • nitrogen-fixation - incorporation of atmospheric nitrogen as a nitrogen source in the cells of certain bacteria and Cyanobacteria
  • node - site on an axis from which leaves or branches arise
  • nutritive cell - specific cell of carpogonial branch with which carpogonium fuses after fertilization in some red algae of the order Cryptonemiales



  • obtuse - blunt or rounded at the end
  • oogamy - union of gametes in which a sperm fertilizes a relatively large, non-motile egg
  • oogonium - female reproductive cell containing one or more female gametes or eggs
  • oligotrophic - nutrient-deficient
  • order - the taxonomic grouping between class and family
  • organelle - specialized structure in a cell, like a plastid or nucleus
  • ostiole - opening in conceptacle or cystocarp through which spores or gametes can escape
  • ovoid - egg-shaped


Last updated: Feb. 05, 2009