词根词缀：cleido-, cleid-, clido-, clid-

【来源及含义】Greek: key; a means of locking or a thing that locks [or unlocks] a door; a key, bar, or hook; a combining form that denotes the clavicle or collarbone

【同源单词】cleidal, cleidarthritis, cleidocostal, cleidocranial, cleidohumeral, cleidohyoid

词根词缀：mastoido-, mastoid-

【来源及含义】Greek: breast; used in the specialized sense as "of or pertaining to the breast-shaped mastoid process of the temporal bone

【同源单词】atlantomastoid, cleidomastoid, mastoid, mastoid angle, mastoid process, mastoidal

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