a buttress supporting a wall or other structure by an arch or part of an arch that transmits the thrust outwards and downwards
story arc
a continuing storyline in a television series that gradually unfolds over several episodes
carbon arc
an electric arc produced between two carbon electrodes , formerly used as a light source
island arc
an arc-shaped chain of islands, such as the Aleutian Islands or the Japanese Islands, usually lying at the edge of a Benioff zone , indicating volcanic activity where the oceanic lithosphere is descending into the earth's interior
reflex arc
the neural pathway over which impulses travel to produce a reflex action, consisting of at least one afferent ( receptor ) and one efferent ( effector ) neuron
arc-boutant
a buttress supporting a wall or other structure by an arch or part of an arch that transmits the thrust outwards and downwards
mercury arc
an electric discharge through ionized mercury vapour , producing a brilliant bluish-green light containing ultraviolet radiation
minute of arc
a period of time equal to 60 seconds ; one sixtieth of an hour
flying buttress
a buttress supporting a wall or other structure by an arch or part of an arch that transmits the thrust outwards and downwards
minute
A minute is one of the sixty parts that an hour is divided into. People often say ' a minute ' or ' minutes ' when they mean a short length of time.