A small South American bird (Anumbius annumbi) that builds a large and complex nest of twigs and thorns.

plural of thornback

The thornback guitarfish (Platyrhinoidis triseriata), a species of ray in the north-eastern Pacific Ocean. / The thornback ray or thornback skate (Raja clavata), a species of ray in the Atlantic Ocean.

plural of thornbill

Any insect of the family Rachiberothidae.

plural of thorny lacewing

Any worm of the order Acanthocephala

plural of thornhead

A particular steroid glycoside.

Any of the spiny bivalve molluscs of the genus Spondylus.