arachnoides

Latin

Etymology

Borrowing from Ancient Greek ᾰ̓ρᾰχνοειδής (ărăkhnoeidḗs, like a cobweb), from ᾰ̓ρᾰ́χνη (ărắkhnē, spider web) +‎ -ο- (-o-) +‎ -ειδής (-eidḗs, -oid, -like).

Pronunciation

Adjective

arachnoīdēs (neuter arachnoīdes or arachnoīdēs); third-declension one-termination adjective (Greek-type) (New Latin)

  1. resembling a spider web

Inflection

Third-declension one-termination adjective (Greek-type).

singular plural
masc./fem. neuter masc./fem. neuter
nominative arachnoīdēs arachnoīdes1
arachnoīdēs
arachnoīdēs arachnoīda
arachnoīdia2
genitive arachnoīdis arachnoīdum
arachnoīdium2
dative arachnoīdī arachnoīdibus
accusative arachnoīdem arachnoīdes1
arachnoīdēs
arachnoīdēs arachnoīda
arachnoīdia2
ablative arachnoīde
arachnoīdī2
arachnoīdibus
vocative arachnoīdes1
arachnoīdēs
arachnoīdēs arachnoīda
arachnoīdia2

1It is unknown whether Classical Latin preserved (or would have preserved) the shortness of the original Greek short ending.
2It is unknown whether adjectives of this type would use i-stem or consonant-stem endings in Classical Latin: the relevant forms are not attested. Depending on the word, either ending or both may be attested in New Latin.

Descendants

  • English: arachnoid