merfolk

As a noun merfolk

is mythical creatures that are human from the waist up and fish from the waist down.

As an adjective undefined is

lacking a definition or value.

As a noun merfolk

is mythical creatures that are human from the waist up and fish from the waist down.

As a proper noun neptune is

(roman god) the god of the ocean and of earthquakes.

As a noun merfolk is

mythical creatures that are human from the waist up and fish from the waist down.

As nouns the difference between menfolk and merfolk

is that menfolk is the male members of a group while merfolk is mythical creatures that are human from the waist up and fish from the waist down.

As nouns the difference between taxonomy and merfolk

is that taxonomy is the science or the technique used to make a classification while merfolk is mythical creatures that are human from the waist up and fish from the waist down.

Merfolk is a holonym of mergirl.

As nouns the difference between merfolk and mergirl

is that merfolk is mythical creatures that are human from the waist up and fish from the waist down while mergirl is a mermaid.