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Terete

Terete is a term used in botany to describe a cross section that is circular, or like a distorted circle, with a single surface wrapping around it. This is usually contasted with cross-sections that are flattened, with a distinct upper surface that is different from the lower surface. The cross-section of a branch in a tree is somewhat round, so the branch is terete. The cross section of a leaf has an upper surface, and a lower surface, so the leaf is not terete. Fruticose lichens are terete, with a roughly circular cross section and a single wrap-around skin-like surface called the cortex, compared to foliose lichens and crustose lichens, which have a flattened cross section with an upper surface that is distinct from the lower surface.

The Collaborative International Dictionary

Terete

Terete \Te*rete"\,

  1. [L. teres, -etis, rounded off, properly, rubbed off, fr. terere to ru

  2. ] Cylindrical and slightly tapering; columnar, as some stems of plants.

WordNet

terete

adj. especially of plant parts; cylindrical and tapering

Wiktionary

terete

a. Having a smooth circular cross-section; cylindrical.