This paper presents a bidirectional investigation on linguistic form and meaning. On the one hand, based on the Chinese Concept Dictionary (CCD), this paper examines the semantic relations between the heads of the conjuncts of nominal coordination. Most of the conjuncts show semantic similarity, a few of them show semantic association, and a few of others show semantic opposition. On the other hand, the semantic relations between the conjuncts provide a new perspective on the noun taxonomy and suggest ways to improve the taxonomy.