This article examines the clinical, pathologic, and radiologic features of pulmonary immaturity, the impact of evolving therapeutic strategies, and the changing face of chronic lung disease of prematurity.
intr.v. cross-mulÂ·tiÂ·plied, cross-mulÂ·tiÂ·plyÂ·ing, cross-mulÂ·tiÂ·plies. To multiply the numerator of one of a pair of fractions by the denominator of the other.
Multiplication (often denoted by the cross symbol  Ã , by a point  Â·  or by the absence of symbol) is one of the four elementary, mathematical operations of arithmetic; with the others being addition, subtraction and division.ultiplication in group theory is typically notated either by a dot, or by juxtaposition (the omission of an operation symbol between elements). So multiplying element a by element b could be notated a b or ab.