-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.
Defining Moments is a thought provoking look at the moral and ethical element of decision making in the workplace. One of the most interesting ideas in this book is the concept that many decisions in the workplace are not between right and wrong, but rather decisions between right and right.