energy that is radiated or transmitted in the form of rays or waves or particles
the act of spreading outward from a central source
being of the achromatic color of maximum darkness; having little or no hue owing to absorption of almost all incident light
of or belonging to a racial group having dark skin especially of sub-Saharan African origin
the entire structure of an organism (an animal, plant, or human being)
a group of persons associated by some common tie or occupation and regarded as an entity
the body excluding the head and neck and limbs
an individual 3-dimensional object that has mass and that is distinguishable from other objects
a collection of particulars considered as a system
