n. In Greek antiquity, an altar; particularly, the small altar of Dionysus which occupied the central point of the orchestra of the Greek theater, and was a visible token of the religious character of the dramatic representations.n. [capitalized] [NL. (Fabricius, 1808).] In entomology, a genus of hesperian butterflies, or skippers. T. alveolus is the grizzled skipper, a British species.