[caus.al] adj (ca. 1530) 1: expressing or indicating cause: causative "a ~ clause introduced by since"
2: of, relating to, or constituting a cause "the ~ agent of a disease"
3: involving causation or a cause "the relationship ... was not one of ~ antecedence so much as one of analogous growth --H. O. Taylor"
4: arising from a cause "a ~ development" -- caus.al.ly adv