seagrass

S1E1A1G2R1A1S1S1
US/ˈsiˌɡɹæs/

noun

Any of various grass-like marine plants that grow underwater in salt water.

Less commonScrabble 9

Meanings

nounseagrass (countable and uncountable, plural seagrasses)

plural seagrasses · alternative sea-grass

  1. countableuncountableAny of various grass-like marine plants that grow underwater in salt water.

    They are not seen again until they arrive as larger juveniles in shallow coastal waters, where they dine on seagrass and algae.

    2007 October 2, Henry Fountain, “Wayward Youths (or Green Turtles) and Their Drifting Ways”, in The New York Times
    1 more example

    There has been some investigation into the potential of seaweeds as a carbon store, and although more is needed, one study says that seaweed habitats are believed to be the most productive of all coastal vegetated ecosystems, and suggested that the world’s seaweed sequesters as much carbon as all the planet’s seagrass meadows, saltmarshes and mangroves combined.

    2023 September 25, Vincent Doumeizel, “Opinion: Seaweed is nutritious, not slimy. Eating it could save the world.”, in CNN

Origin

  1. Proto-Indo-European*seykʷ-
  2. Proto-Germanic*sīhwaną
  3. Proto-Germanic*saiwiz
  4. Proto-West Germanic*saiwi
  5. Old Englishsǣ
  6. Middle Englishsee
  7. Englishsea
  8. Proto-Indo-European*gʰreh₁-
  9. Proto-Germanic*grasą
  10. Proto-West Germanic*gras
  11. Old Englishgræs
  12. Middle Englishgras
  13. Englishgrass
  14. Englishseagrass

From sea + grass.

Full word history & related roots →

Translations

Arabic نجيل بحري
  • نجيل بحريgrasslike marine plants
Chinese Mandarin 海草
  • 海草 (hǎicǎo)grasslike marine plants
Finnish meriheinä, meriruoho
  • meriheinägrasslike marine plants
  • meriruohograsslike marine plants
French herbier marin, posidonie
  • herbier maringrasslike marine plants
  • posidoniegrasslike marine plants
German Seegras
  • Seegrasgrasslike marine plants
Greek θαλάσσια φανερόγαμα
  • θαλάσσια φανερόγαμα (thalássia fanerógama)grasslike marine plants
Hindi सागरघास
  • सागरघास (sāgarghās)grasslike marine plants
Indonesian lamun
  • lamungrasslike marine plants
Japanese 海草, 海草
  • 海草 (kaisō)grasslike marine plants
  • 海草 (umikusa)grasslike marine plants
Korean 해초
  • 해초 (haecho)grasslike marine plants
Latin gramen maritimum
  • gramen maritimumgrasslike marine plants
Māori rimurehia, karepō
  • rimurehiagrasslike marine plants
  • karepōgrasslike marine plants
  • nanagrasslike marine plants
Norwegian Bokmål sjøgress
  • sjøgressgrasslike marine plants
Persian علف دریایی
  • علف دریاییgrasslike marine plants
Polish trawa morska
  • trawa morskagrasslike marine plants
Portuguese erva marinha
  • erva marinhagrasslike marine plants
Russian морские травы
  • морские травы (morskije travy)grasslike marine plants
Spanish pradera marina
  • pradera marinagrasslike marine plants
Swedish sjögräs
  • sjögräsgrasslike marine plants
Thai หญ้าทะเล
  • หญ้าทะเล (yâa-tá-lee)grasslike marine plants
Turkish deniz çayırı
  • deniz çayırıgrasslike marine plants
Vietnamese cỏ biển
  • cỏ biểngrasslike marine plants
Cite this entry
APA

seagrass. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/seagrass

MLA

“seagrass.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/seagrass. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “seagrass,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/seagrass.

Source: seagrass on Wiktionary, CC BY-SA 4.0.