词根词缀：arachno-, arachn-

【来源及含义】Greek: spider; the arachnoidea; when used in medicine this Greek element refers to a membrane, veins, or any web-like structure in the body

【相关词根词缀】 Cross references of word families that are related directly, or indirectly, to: "spider; arachnoidea": acaro-; arano-; mite, mites.

【同源单词】arachnactis, Arachne, arachnean, arachnephobia, arachnid, Arachnida

词根词缀：-oid, -oidal, -oidism, -odic

【来源及含义】Greek: a suffix; like, resembling, similar to, form

【相关词根词缀】 Inter-related cross references, directly or indirectly, involving word units dealing with "form, shape, appearance": eido-; figur-; form-; icono-; ideo-; imag-; morpho-; typo-.

【同源单词】acanthoid, acanthozooid, acaroid, acidoid, acromegaloidism, acrostichoid