[hel-i-kuh l, hee-li-]


pertaining to or having the form of a helix; spiral.

Origin of helical

First recorded in 1605–15; helic- + -al1
Related formshel·i·cal·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for helical

Historical Examples of helical

British Dictionary definitions for helical



of or shaped like a helix; spiral
Derived Formshelically, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for helical

"spiral-shaped," 1590s, from Latin helicem (see helix) + -al (1).

Online Etymology Dictionary, © 2010 Douglas Harper

helical in Medicine


[hĕlĭ-kəl, hēlĭ-]


Of or having the shape of a helix; spiral.
Having a shape approximating that of a helix.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.