myognathus

my·og·na·thus

(mī-og'nă-thŭs), In the diphthong gn, the g is silent only at the beginning of a word.
An unequal conjoined twin in which the rudimentary head of the parasite is attached to the lower jaw of the autosite by muscle and skin only. See: conjoined twins.
[myo- + G. gnathos, jaw]

myognathus

(mī-ŏg′nă-thŭs) [″ + gnathos, jaw]
Deformed individual with a rudimentary conjoined twin.