modal (
http://definr.com/modal)
adj 1: (statistics) relating to or constituting the most frequent
value in a distribution; "the modal age at which
American novelists reach their peak is 30" [syn:
modal(a),
average]
2: of or relating to a musical mode; especially written in an
ecclesiastical mode
3: relating to or expressing the mood of a verb; "modal
auxiliary"