"Trisection" Natural Recordings by Native Speakers
Trisection: the act or process of dividing something (such as a line or an angle) into three equal parts.
Triquetrous refers to something that has three corners or three-ribbed shape, especially in botany, describing a type of leaf, such as a triquetrous leaf, which has a leaf margin with three-angled or lobed edges.
Adjective: tri-seriate (not "triseriate" - "triseriate" is the adjectival form of the verb "triseriate")<br><br>Meaning: arranged in three rows or series; having three levels or tiers.<br><br>Example: The tri-seriate seating arrangement in the stadium allowed for optimal viewing for the audience.<br><br>Synonyms: three-tiered, triple-tiered.