(Britain) A lightweight building block made from cinders and concrete.

A system in which a rope, cable, or chain (the tackle) is passed over pulleys enclosed in two (or rarely more) blocks, one fixed and one attached to a load, which is used to gain mechanical advantage to lift or pull heavy loads.

A lightweight building block made from cinders and concrete.

plural of blocker

(sports) One who blocks or impedes the movement of an opponent. / (computing) One who prevents another user from contacting them electronically.

A lightweight building block made from cinders and concrete.

The state of being blocked. / A thing that is blocking; an obstruction.

a copolymer that is a block polymer - adjacent blocks being multiples of different monomers

(chemistry) A polymer which is a block macromolecule.

(chemistry) any macromolecule composed of a linear sequence of blocks