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Serpula vs Serrula - What's the difference?

serpula | serrula |

As a proper noun serpula

is .

As a noun serrula is

(zoology) a kind of tooth found in spiders.

serpula

English

(wikipedia serpula) (wikispecies)

Noun

(en-noun)
  • (zoology) Any of numerous species of tubicolous annelids of the genus Serpula'' and allied genera of the family ''(taxlink) that secrete a calcareous tube, usually irregularly contorted, but sometimes spirally coiled, with a wreath of plumelike and often bright-colored gills around its head, and usually an operculum to close the aperture of its tube when it retracts.
    • (Webster 1913)

    serrula

    English

    Noun

    (en-noun)
  • (zoology) A kind of tooth found in spiders.
    • ----