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

词根词缀：ostreo-, ostra-, ostre-, ostrei-, ostri-; ostraco-, ostrac-, -ostraca, -ostracan

【来源及含义】Greek: oyster; creatures having or characterized by a type of hard shell

【同源单词】ostraceous, ostracine, ostracism, ostracize, ostracoid, ostraconophobia