sessile

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sessile

sessile leaf (Elizabeth Morales)

adj.

1. Botany. Stalkless and attached directly at the base: sessile leaves.
2. Zoology. Permanently attached or fixed; not free-moving: a sessile barnacle.

[Latin sessilis, low, of sitting, from sessus, past participle of sedēre, to sit.]

sessility ses·sil'i·ty (sĕ-sĭl'ĭ-tē) n.

(SES-il)

adjective
1. Attached directly to the base, without a stalk (as a leaf or a flower).
2. Permanently attached; immobile (as an animal, for example a barnacle).

Etymology
From Latin sessilis (relating to sitting), from sedere (to sit). Ultimately from the Indo-European root sed- (to sit) that is also the source of sit, chair, saddle, soot, sediment, cathedral, and tetrahedron

Usage
"The history of seating is a serious subject... several books pay tribute to what might be called great moments in modern chair history... here is the bottom line on them. The archdruid, or should I say the chairman, of the sessile sect is Alexander von Vegesack, the director of the Vitra Design Museum, the major collection of modern chairs extant." — Raymond Sokolov; Staying Put; The Wall Street Journal (New York); Dec 4, 1997.

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Not pedunculated; attached by a broad base.

• s. oak — quercus petraea.
• s. wart — without pedicle.

Stalkless; attached directly to the main stem.