The Collaborative International Dictionary of English v.0.48:

Cesarean \Ce*sa"re*an\, Cesarian \Ce*sa"ri*an\, a.
   Same as C[ae]sarean, C[ae]sarian.
   [1913 Webster] cesarean

The Collaborative International Dictionary of English v.0.48:

cesarean \cesarean\ cesarian \cesarian\adj.
   1. same as caesarian.
      [WordNet 1.5] cesarean

The Collaborative International Dictionary of English v.0.48:

cesarean \cesarean\, cesarian \cesarian\n.
   Same as cesarean section.

   Syn: cesarean section, cesarian section, caesarean section,
        C-section, cesarean, caesarean.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

cesarian
    adj 1: relating to abdominal delivery [syn: cesarean,
           cesarian, caesarean, caesarian]
    n 1: the delivery of a fetus by surgical incision through the
         abdominal wall and uterus (from the belief that Julius
         Caesar was born that way) [syn: cesarean delivery,
         caesarean delivery, caesarian delivery, cesarean
         section, cesarian section, caesarean section,
         caesarian section, C-section, cesarean, cesarian,
         caesarean, caesarian, abdominal delivery]