pius x(n = noun.person) giuseppe melchiorre sarto, giuseppe sarto - pope who condemned religious modernism; he was canonized in 1954 because of his interest in the poor (1835-1914);
is a kind of bishop of rome, catholic pope, holy father, pontiff, pope, roman catholic pope, vicar of christ

antonius pius, factor x, gen x, generation x, leo x, letter x, louis x, malcolm x, pius ii, pius ix, pius v, pius vi, pius vii, pius xi, pius xii, regression of y on x, x, x chromosome, x ray