Definition of "ponderable"

ponderable

adjective
comparative more ponderable, superlative most ponderable
1. (physics) Having a detectable amount of matter; having a measurable mass.
2. Worthy of note; significant, interesting.
3. (rare) Heavy; ponderous.
  Quotations
  The very mother's head you swore by in the dock is a heavier head, crowned with ponderable hair.
  1936, Djuna Barnes, Nightwood, Faber & Faber, published 2007, page 77