noun, noun which may take the genitive case particle 'no'
double-headed
Describes something with two heads, such as a tool, weapon, or mythical creature. Often used attributively with の.
A double-headed hammer is handy.
A double-headed dragon appears in that myth.
diarchy; dyarchy
Compound of 両 (both) and 頭 (head). The exact historical derivation is uncertain, but the meaning is transparent from the kanji.