Having the form or characteristics of a newt

Not Newtonian

A device that demonstrates conservation of momentum and energy via a series of swinging spheres. When a sphere at one end is lifted and released, the resulting force travels through the line and pushes the opposite sphere upward, repeating the process as it swings back down.

Alternative spelling of kilonewton

(philosophy) A philosophical razor which states that what cannot be settled by experiment is not worth debating.

(humorous) December 25, Sir Isaac Newton's birthday (in the Julian calendar). / (humorous) December 25 through January 4, Sir Isaac Newton's birthday (in the Gregorian calendar).

(physics) A pattern of interference of light characterized by concentric rings that is caused by light's reflection from two surfaces, one of which is usually round.

(rare, nonstandard) Newness.

plural of Newtonmas

A locale in England. / A locale in Wales. / A village in County Laois. / A village in Owney and Arra, County Tipperary. / A civil parish of County Westmeath. / A townland in County Dublin.