(astrophysics) The minimum speed needed to escape the gravitational field of a planet or other body.

(astronomy) A spring constellation of the northern sky, said to resemble the sails of a ship. Until 1763, it was part of a larger constellation, Argo Navis.

The speed at which an object in free-fall and not in a vacuum ceases to accelerate downwards because the force of gravity is equal and opposite to the drag force acting against it.

any spider, of the family Eresidae, that build unkempt webs

A non-violent separation of formerly united nations, especially the one which occurred when Czechoslovakia split into the Czech Republic and Slovakia in 1993.

Any non-violent political revolution, especially the events in Czechoslovakia that led to the velvet divorce.

(mathematics, physics) The angle turned, in a given time, by a body rotating about an axis; the rate of rotation through an angle.

(physics) the propagation velocity of the envelope of a modulated travelling wave, which is considered as the propagation velocity of information or energy contained in it.

(physics) The root mean square of the velocities of all the molecules in a volume of gas; directly proportional to its temperature in the case of an ideal gas.

(anatomy) the soft palate / (botany) a thin membrane partially covering the cluster of sporangia near the leaf base in quillworts and their extinct relatives