The breaking down of mucus

Something that bears a resemblance to mucus

The act of determining an animal’s age by looking at its teeth

A type of animal who has only had a single testicle descend into its scrotum

A type of vaccine that has been created just for a single type of organism or antigen

The history of certain organisms or their various parts

The quality of having one limb paralyzed

A strand of material that is singular

The quality of being able to pair with a single mate

The term for an animal with a single stomach compartment