[ vur-tuh-si-las-ter ]
/ ˌvɜr tə sɪˈlæs tər /

noun Botany.

an inflorescence in which the flowers are arranged in a seeming whorl, consisting in fact of a pair of opposite axillary, usually sessile, cymes, as in many mints.

Origin of verticillaster

1825–35; < Latin verticill(us) verticil + -aster1

Related forms

ver·ti·cil·las·trate [vur-tuh-si-las-treyt, -trit] /ˈvɜr tə sɪˌlæs treɪt, -trɪt/, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for verticillaster

British Dictionary definitions for verticillaster


/ (ˌvɜːtɪsɪˈlæstə) /


botany an inflorescence, such as that of the dead-nettle, that resembles a whorl but consists of two crowded cymes on either side of the stem

Derived Forms

verticillastrate (ˌvɜːtɪsɪˈlæsˌtreɪt, -trɪt), adjective

Word Origin for verticillaster

C19: from New Latin; see verticil, -aster
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012