planospiral

adjective

pla·​no·​spiral

¦plānō+

variants or less commonly planispiral

¦plānə+

: having the shell coiled in one plane

—used especially of foraminifers and gastropod mollusks

planospirally

"+

adverb

Word History

Etymology

planospiral from plan- entry 2 + spiral; planispiral from plani- + spiral

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