Yes, for 3/4 time a whole bar would correspond to a dotted half note.

For full-on insanity, go look up "mensural notation," which is what our modern notation has developed out of. In mensural notation, it turns out that what we call a "whole" note is actually a "semibreve," or half of a "short" note. A "breve" or short note is equivalent to two of our whole notes. A "longa" or long note is equivalent to four of our whole notes. And a "maxima" is equivalent to eight of our whole notes. Just imagine trying to sing a single note and hold it for eight measures without taking another breath along the way!