Bimestrial
ahd-5
adjective.
Occurring every two months; bimonthly.
adjective.
Lasting two months.
The Century Dictionary and Cyclopedia
Happening every two months; continuing two months.
the GNU version of the Collaborative International Dictionary of English
adjective.
Continuing two months.
Wiktionary, Creative Commons Attribution/Share-Alike License
adjective.
Occurring
once
every two
months
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adjective.
occurring every two months
adjective.
two months long; lasting two months