an image of a structure that is produced by ultrasonography (reflections of high-frequency sound waves); used to observe fetal growth or to study bodi more..an image of a structure that is produced by ultrasonography (reflections of high-frequency sound waves); used to observe fetal growth or to study bodily organs(noun.artifact)
a figure of speech in which an expression is used to refer to something that it does not literally denote in order to suggest a similarity (noun.communication)
the consequence of one event setting off a chain of similar events (like a falling domino causing a whole row of upended dominos to fall) (noun.phenomenon)