pushup: an arm exercise performed lying face to the floor and pushing the body up and down with the arms
abstraction: a general concept formed by extracting common features from specific examples
magnoliidae: a group of families of trees and shrubs and herbs having well-developed perianths and apocarpous ovaries and generally regarded as the most primitive extant flowering plants; contains 36 families including Magnoliaceae and Ranunculaceae; sometimes classified as a superorder