zygostaticalhttp://www.oed.com/dictionary/zygostatical_adj%3Ftab%3Dmeaning_and_usezygostatical, adj.
First published 1921; not fully revised

† zygostaticaladjective

Obsolete rare.
  1. 1656
    Apparently only attested in dictionaries or glossaries.
    1. 1656
      Zygostatical..belonging to the pound weight of Sixteen ounces, or to a Clark of a Market that looks to weights.
      T. Blount, Glossographia

Originally published as part of the entry for zygostat, n.

zygostat, n. was first published in 1921; not fully revised.