Definition of nema in US English:

nema

noun

  • A long, slender, tubular extension of the sicula in a graptolite.

noun

Biology
  • A nematode, especially one that parasitizes plants.

Origin

Early 20th century. From German Nema from ancient Greek νῆμα thread<br>early 20th century. Shortened from nematode. Compare ancient Greek νῆμα thread.