reference point
point or level relative to which a physical measurement is taken
list price
reference price that the manufacturer recommends that the retailer charge to consumers for a product
standard state
reference point used to calculate the properties of a material under different conditions
ground
reference point in an electrical circuit from which voltages are measured
ground in electronics
common ground network in electronic circuits and systems, which serves as a zero voltage reference
epoch
date and time from which a computer measures system time
standard temperature and pressure
reference values for temperature and pressure
celestial equator
projection of the Earth's equator out into space
epoch
reference point from which time is measured
standard acceleration of free fall
standard gravitational acceleration on Earth's surface