- a compact branching inflorescence, as of the lilac, in which the main axis is indeterminate and the lateral axes are determinate.
noun plural thyrses or thyrsi (ˈθɜːsaɪ)
- botany a type of inflorescence, occurring in the lilac and grape, in which the main branch is racemose and the lateral branches cymose
- A dense inflorescence in which the side branches end in cymes, as in the lilac. Also called thyrsus See more at inflorescence.