bimonthly

from WordNet (r) 3.0 (2006)

bimonthly
    adv 1: twice a month; "salaries are paid semimonthly" [syn:
           {semimonthly}, {bimonthly}]
    2: every two months; "the bill was payable bimonthly"
    adj 1: occurring twice a month; "a semimonthly publication"
           [syn: {semimonthly}, {bimonthly}]
    2: occurring every two months; "bimonthly visits" [syn:
       {bimonthly}, {bimestrial}]
    n 1: a periodical that is published twice a month or every two
         months (either 24 or 6 issues per year)

from The Collaborative International Dictionary of English v.0.48

bimonthly \bi*month"ly\, a. [Pref. bi- + monthly.]
   Occurring, done, or coming, once in two months; as, bimonthly
   visits; bimonthly publications. -- n. A bimonthly
   publication.
   [1913 Webster]

from The Collaborative International Dictionary of English v.0.48

Bimonthly \Bi*month"ly\, adv.
   Once in two months.
   [1913 Webster]