plural of diiodothyronine

The state or characteristic of being retroactive. / (law) The application of a law to events that took place before it was made.

A surname from Irish. / An unincorporated community in Gilmer County, West Virginia, United States.

(military, historical) An early automated anti-aircraft fire-control system, capable of aiming a gun at an aircraft based on simple inputs such as observed speed and the angle to the target.