词根词缀：form-, -form, forma-, format-

【来源及含义】Latin: shape, structure, figure, outer appearance, composition, to compose; visual appearance; spacial arrangement; to develop or to acquire; to produce

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

【同源单词】acariform, Acariformes, Accipitriformes, aciculiform, aciform, acinaciform

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