submargin

From sub- +‎ margin.

submargin (plural submargins)

(entomology) An area parallel to a margin but slightly further in.
- 1894, Joel Asaph Allen, Bulletin of the American Museum of Natural History, page 108:
  The ears are brownish, more or less rusty, the extreme edge whitish, particularly on the posterior border, the apical third externally with a submargin of black, expanding towards the tip into a broad blackish subapical spot.
- 2005, Katy Mallett, Flora of Australia (volume 44, part 2, page 137)
  Glumes slightly unequal […] ; florets slightly shorter than the longer glume; lemma ciliate on the margins or submargins in the upper part

English