A fixed reference point or set of reference points which precisely define a system of measurement or a coordinate system.
A premise from which conclusions are drawn.
A floating reference point, or SLDMB, used to evaluate surface currents in a body of water. Often employed by coastal search and rescue.
A fact known from direct observation.
To provide missing data points by using a mathematical model to extrapolate values that are outside the range of a measuring device.
a pointing stick
The clitoris.
A small lump or knob.
The essence or core of an issue, argument etc.
To push; to nudge.
To beckon.
To hit the ball weakly.