A surname from Czech.

(historical) A punishment whereby a hole or bore was made in someone's tongue.

A clam, Tridacna crocea, capable of burrowing even through rock.

plural of boring clam

(of an insect) That bores through wood.

plural of tongue-boring

(simile, informal) Very boring; devoid of interest.

(geology) The period of time from 1.8 Gya to 800 Mya, on Earth, lying in the middle of the Proterozoic.

plural of tunnel boring machine

(engineering) A large machine used to excavate tunnels with a circular cross section.