A class of drugs, also more simply called beta blockers, that block beta-adrenergic substances such as adrenaline (epinephrine), a key agent in the "sympathetic" portion of the autonomic (involuntary) nervous system. By blocking the action of the sympathetic nervous system on the heart, these agents relieve stress on the heart. They slow [..]

c. 1400 of a tool, c. 1600 of a person, agent noun from block (v.). U.S. football sense from 1914.

A member of a particular block: F-blocker, E-blocker, and so on.

One of a number of leather strips joined together for use as trimming for shoes.

(n) a football player whose responsibility is to block players attempting to stop an offensive play(n) a class of drugs that inhibit (block) some biological process

Drugs that bind to but do not activate Adrenergic Receptors. Adrenergic antagonists block the actions of the endogenous adrenergic transmitters Epinephrine and Norepinephrine.

An ace that lands in front of the hole, essentially blocking the hole from sliders.

A style of play where use of the block is the primary stroke.

A bowl that blocks someone from reaching the desired target

Agent noun of block; something that blocks something specific. # A playing card, needed by one player, that is held by another. # A close-fitting rectangular glove worn by a goalie in multiple for [..]