Concerned with or relating to origins or beginnings.
Late 19th century; earliest use found in The Catholic World. From proto- + -logical.
Relating to an early, basic, or undeveloped form of logic; (Philosophy) designating a method of expressing simple logical relationships which has the basic characteristics of a logical calculus, without being a true form of symbolic logic.
1930s; earliest use found in Robert Macalister (1870–1950), archaeologist. From proto- + logical.