plural of delta ray

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

(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.

(behavioral psychology) A stimulus that does not reinforce an existing behavior in a subject and causes the subject to employ a new behavior.

plural of delta iron

Synonym of Delta variant

Alternative spelling of Delta strain

A relatively low-status woman in the sociosexual hierarchy, (ranking below alpha, beta, and gamma females, but above omega females). / A female animal that ranks fourth in the social hierarchy.

A male without an authoritative position or role in social or group hierarchy; commoner / A male animal that ranks fourth in the social hierarchy.