IPA: //ˌproʊtəˈstɛlɪk//
KK: /proʊˈtoʊstɛlɪk/
Relating to or having a specific type of plant structure known as a protostele, which is a central cylinder of vascular tissue in some plants.
The protostelic arrangement of the plant's vascular system allows for efficient transport of nutrients and water.
Protostelic → It is formed from "proto-" (meaning first or primary) and "stelos" (from Greek, meaning pillar or column). The word refers to the first or primary type of stele, which is a type of plant structure.
Think of 'proto-' meaning first, and 'stelos' referring to a pillar — this helps you remember that 'protostelic' describes the first type of plant structure.
No commonly confused words.