%weekly%

adj. occurring during the middle of the week; as, a midweekly prayer meeting.
Syn. -- midweek. [ WordNet 1.5 ]

a. Coming, or made, or done, once every half week; as, a semiweekly newspaper; a semiweekly trip. -- n. That which comes or happens once every half week, esp. a semiweekly periodical. -- adv. At intervals of half a week each. [ 1913 Webster ]

a. [ Pref. tri- + weekly. ] Occurring or appearing three times a week; thriceweekly; as, a triweekly newspaper. -- adv. Three times a week. -- n. A triweekly publication. [ 1913 Webster ]

☞ This is a convenient word, but is not legitimately formed. It should mean occurring once in three weeks, as triennial means once in three years. Cf. Biweekly. [ 1913 Webster ]

a. 1. Of or pertaining to a week, or week days; as, weekly labor. [ 1913 Webster ]

2. Coming, happening, or done once a week; hebdomadary; as, a weekly payment; a weekly gazette. [ 1913 Webster ]

n.; pl. Weeklies A publication issued once in seven days, or appearing once a week. [ 1913 Webster ]