(US, Canada) The great northern diver (Gavia immer)

The average citizen, as contrasted with the social, political or cultural elite.

(arithmetic) A fraction in the form of one integer divided by another, non-zero, integer.

(idiomatic) A characteristic or interest shared by multiple people or systems; any belief, etc. held in common.

plural of common year

plural of common fraction

Ordinary sensible understanding; one's basic intelligence which allows for plain understanding and without which good decisions or judgments cannot be made.

The herb Eupatorium perfoliatum, also known as thoroughwort. Often used by herbalists as a stimulant, febrifuge, and laxative.

A small falcon, Falco tinnunculus.

That which is known by most people, and thus cannot reasonably be contested.