Over the course of December at Ninoy Aquino Manila International Airport, the length of the day is essentially constant. The shortest day of the month is December 22, with 11 hours, 16 minutes of daylight and the longest day is December 1, with 11 hours, 20 minutes of daylight.
Definition of nuclear for English Language Learners. : 1  of, relating to, producing, or using energy that is created when the nuclei of atoms are split apart or joined together. : 2  having or involving nuclear weapons. : 3  of or relating to the nucleus of an atom.
Usage The words nuclear and atomic mean the same thing when referring to weapons or to the making of power: We say nuclear (or atomic) weapons and nuclear (or atomic) energy. But in most scientific uses nuclear and atomic mean different things. Nuclear is used to refer to the nucleus of an atom, where the protons and neutrons are located. When a radioactive element gives off a neutron, for example, we call this a nuclear event.