(chemistry) A notation for denoting the prevalence of an isotope, equal to the normalized ratio of one isotope to another in a sample relative to that same ratio in a standard.

One of 64 counties in Colorado, United States. County seat: Delta. Named after the county seat, which is situated on a delta.

(finance) A measure of derivative price sensitivity with respect to changes in the correlation between the underlying assets in a multi-asset option.

plural of delta-v

plural of Dirac delta

plural of delta connection

plural of delta wing

plural of delta particle

(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 stimulus delta