词根词缀：helico-, helic-, helici-, heli-, helix-

【来源及含义】Greek: spiral, coil; twisted, bent; spiral-shaped; a coil; by extension, "snail"

【相关词根词缀】Other "coil" words are at this spiro- unit.

【同源单词】helical, helicase, heliciform, helicine, helicity, helicobacter

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