- acronemeThe slender section of a flagellum
- nemaliteA variety of brucite, occurring in slender fibers which are elastic and easily separated, having a color of white with a shade of yellow and a highly silky luster.
- nematheciumA kind of fructification on certain red algae, consisting of an external mass of filaments that separate into tetraspores.
- plectonemeA loop of helices (especially of nucleic acid) twisted together such that they cannot be separated without breaking them