zighttp://www.oed.com/dictionary/zig_n%3Ftab%3Dmeaning_and_usezig, n.
First published 1986; not fully revised

zignoun

  1. 1978–
    A movement or direction inclined at an angle to that indicated by zag n., adv., & v.
    1. 1978
      The transports were on a zig away.
      H. Wouk, War & Remembrance vii. 72
    2. 1982
      ‘They've turned ninety degrees to starboard.’.. ‘A zig, sir?’ ‘Afraid not. They've altered course.’
      A. Melville-Ross, Trigger v. 53
    3. 1985
      One word more on change and development,..the zigs and zags and the farings forward on one's pilgrimage to God.
      S. Vanauken, Under Mercy x. 246

Originally published as part of the entry for zig, v.

zig, v. was first published in 1986; not fully revised.