subequal

sub- +‎ equal

subequal (not comparable)

1. (biology) Nearly equal
   • 1869 April, “Anthropological News”, in The Anthropological Review, volume VII, number XXV, London: Asher & Co., […], →OCLC, page 215:

     The Nova Scotian Giantess.—A correspondent had the opportunity of inspecting this remarkably large female [Anna Swan] during the exhibition at the Egyptian Hall, and forwards the following notes:— […] The hand is spatulous; the fingers short and subequal in length.

2. (mathematics) Describing a set of numbers, none of which is as great as the sum of all the rest

• subequality
• subequally