Standard Lemma guide

sessile

adj · 4 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • /ˈsɛsaɪl/
  • /ˈsɛsɪl/
  • Southern-England: Recorded audio is listed in the source snapshot.

1

adj

Meaning 1

Permanently attached to a substrate; not free to move about.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

Topics: biology, natural-sciences, zoology

Examples

  • a sessile oyster

Meaning relationships

Synonyms: attached, fixed, immobile, immotile, immovable, inanimate, inert, lifeless, sessile, static, rigid, stationary, stuck, unmovable, unmoveable

Antonyms: mobile, motile, vagile, ambulatory, animate, kinetic, motive, movable

2

adj

Meaning 2

Attached directly by the base; not having an intervening stalk; stalkless.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

Topics: biology, botany, medicine, natural-sciences, oncology, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

adjective

Meaning 3

attached directly by the base; not having an intervening stalk

Definition source: Princeton WordNet 3.0

Examples

  • sessile flowers
  • the shell of a sessile barnacle is attached directly to a substrate

Meaning relationships

Synonyms: stalkless

Antonyms: pedunculate

4

adjective

Meaning 4

permanently attached to a substrate; not free to move about

Definition source: Princeton WordNet 3.0

Examples

  • sessile marine animals and plants

Meaning relationships

Synonyms: none provided

Antonyms: vagile

History

Etymology

From Latin sessilis (“sitting”), from sessus, perfect passive participle of verb sedeō (“to sit”), + adjective suffix -ilis. Compare session.

Across languages

Translations

33 source translations are retained for this English entry.

  • Bulgarian: прикрепен (prikrepen) — zoology
  • Bulgarian: неподвижен (nepodvižen) — zoology
  • Catalan: sèssil — zoology
  • Finnish: alustaan kiinnittynyt — zoology
  • French: sessile — zoology
  • German: festgewachsen — zoology
  • German: festsitzend — zoology
  • German: sitzend — zoology
  • German: sessil — zoology
  • Italian: sessile — zoology
  • Polish: osadzony — zoology
  • Portuguese: séssil — zoology
  • Russian: сидя́чий (sidjáčij) — zoology
  • Russian: прикреплённый (prikrepljónnyj) — zoology
  • Spanish: sésil — zoology
  • Swedish: sessil — zoology
  • Swedish: fastsittande — zoology
  • Bulgarian: без дръжка (bez drǎžka) — botany
  • Catalan: sèssil — botany
  • Finnish: varreton — botany
  • Finnish: kannaton — botany
  • German: ungestielt — botany
  • German: stiellos — botany
  • German: sessil — botany
  • German: sitzend — botany
  • Greek: άμισχος (ámischos) — botany
  • Italian: sessile — botany
  • Polish: bezogonkowy — botany
  • Polish: bezszypułkowy — botany
  • Portuguese: séssil — botany
  • Russian: сидя́чий (sidjáčij) — botany
  • Russian: бесчерешко́вый (besčereškóvyj) — botany
  • Spanish: sésil — botany