Webster's 1913 Dictionary
HETEROSOMATI
Het `e *ro *so "ma *ti, n. pl. Etym: [NL. , fr. Gr. (Zoöl.)
Defn: An order of fishes, comprising the flounders, halibut, sole, etc. , having the body and head asymmetrical, with both eyes on one side. Called also Heterosomata, Heterosomi.
Duden Dictionary
Heterosom
He te ro som Substantiv, Neutrum Biologie , das |Heteros o m |das Heterosom; Genitiv: des Heterosoms, Plural: die Heterosomen zu griechisch sõma = Körper Heterochromosom