Lawful; done with permission from authority.

(medicine) A rare inborn disorder, the sufferers of which cannot feel pain.

plural of conger eel

That which tends to congeal.

The condition of being congealable

Able to congeal.

doubling, twinning

Having the same (kind of) origin or action / Belonging to the same taxonomic genus; congeneric

Simultaneous generation (as of heat and light from the same action)

(geology) A fragment of rock broken off by the action of frost