arachnoid

== English == === Pronunciation === IPA(key): /əˈɹæk.nɔɪd/ Rhymes: -æknɔɪd === Etymology 1 === Mid 18th century borrowing from New Latin arachnoīdēs, from Ancient Greek ᾰ̓ρᾰχνοειδής (ărăkhnoeidḗs, “like a cobweb”), from ᾰ̓ρᾰ́χνη (ărắkhnē, “spider web”) +‎ -ο- (-o-) +‎ -ειδής (-eidḗs, “-oid, -like”). By surface analysis, arachn- +‎ -oid. ==== Adjective ==== arachnoid (not comparable) Relating to or resembling spider webs; covered with or composed of soft loose hairs or fibers. (anatomy) Relating to the arachnoid mater. ===== Derived terms ===== arachnoid mater periarachnoid subarachnoid superarachnoid ===== Translations ===== ==== Noun ==== arachnoid (plural arachnoids) (neuroanatomy) Ellipsis of arachnoid mater. (astronomy) A round network of fractures in the crust of Venus. ===== Derived terms ===== arachnoidal arachnoidian arachnoiditis ===== Translations ===== === Etymology 2 === 19th century from translingual Arachnida +‎ -oid. ==== Adjective ==== arachnoid (not comparable) (arachnology, relational) Relating to or resembling spiders. ===== Translations ===== ==== Noun ==== arachnoid (plural arachnoids) An arachnid. === References === “arachnoid”, in Lexico, Dictionary.com; Oxford University Press, 2019–2022. “arachnoid”, in Merriam-Webster Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present.