noun which may take the genitive case particle 'no'
one-horned; unicorn (attributive)
Used attributively with の to describe a creature or object having a single horn. Often appears in technical or mythological contexts.
単角のサイは絶滅の危機にある。
The one-horned rhinoceros is endangered.
伝説の単角の獣は一角獣と呼ばれる。
The legendary one-horned beast is called a unicorn.