-blast. A suffix meaning an immature precursor cell of the type indicated by the preceding word. [G. blastos, germ]. immature precursor cell type; the cell type is denoted by the preceding syllables, e.g. osteoblast.
(plural defining moments) A moment in time that defines something, such as a person's success or failure, achievement or demise, talent, etc. A point at which the essential nature or character of a person, group, etc., is revealed or identified.
Moment is a quantitative measure (descriptor), popularly used in mechanics and statistics, to describe the spatial distribution of set of points. In most simplistic terms, moments are set of scalars that provide an aggregated measure of a set of vectors. The definition of moments is the same across domains of mechanics, statistics, and computer vision.