ceremonially

from WordNet (r) 3.0 (2006)

ceremonially
    adv 1: in a ceremonious manner; "my mother advised her children
           ceremoniously" [syn: {ceremoniously}, {ceremonially}]
           [ant: {unceremoniously}]
    2: in a ceremonial manner; "he was ceremonially sworn in as
       President" [syn: {ceremonially}, {ritually}]

from The Collaborative International Dictionary of English v.0.48

Ceremonially \Cer`e*mo"ni*al*ly\, adv.
   According to rites and ceremonies; as, a person ceremonially
   unclean.
   [1913 Webster]