triserial

[ trahy-seer-ee-uh l ]
/ traɪˈsɪər i əl /

adjective

arranged in three series or rows.
Botany. having only three verticils.

Origin of triserial

First recorded in 1855–60; tri- + serial

British Dictionary definitions for triserial

triserial
/ (traɪˈsɪərɪəl) /

adjective

arranged in three rows or series