(aeronautics) An aircraft wing having a swept-back shape in the form of an isosceles triangle; used mostly on supersonic aircraft

A hyperon of short life.

(electricity) A type of three-phase connection.

A particular allotrope of iron.

(physics) A vector change in velocity, especially a small change as a result of a corresponding change in some other parameter

(physics) An electron ejected by recoil when a rapidly moving alpha particle or other charged particle passes through matter.

plural of delta ray

plural of delta iron

(mathematics) A function-like symbol denoted as δ, with the property ∫f(t)𝛿(x-t)dt=f(x), informally understood as a function with an infinite value at 0 and zero elsewhere, and formally as a distribution or a measure.

(mathematics) A binary function, written as δ with two subscripts, which evaluates to 1 when its arguments are equal, and 0 otherwise.