not by itself, but it could spark if struck on something else correctly
thumb nail, thumb tack, thumb screw, thumb print
thumb tack already is an English word.
Thumb tack sinks in water and floats in mercury.
a thumb tack is a simple machine called the lever
Pull it out.
it made of cut nails
a thumb tack
This is your chance to become a scientist. Weigh the contents of a packet of thumb tacks, and divide the result by the number of tacks. This will be the average weight of a thumb tack.
Take it to the vet now. That thumb tack can poke or rip holes in your cats organs or get stuck in an organ causing a serious infection.
They are the same thing.
Thumb tack
2cm ====================== I disagree.... 1 cm at the most.