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parastichy

[pi-ras-ti-kee]
noun, plural pa·ras·ti·chies. Botany.
  1. one of a number of seemingly secondary spirals or oblique ranks winding around the stem or axis to the right and left in a spiral arrangement of leaves, scales, etc., where the internodes are short and the members closely crowded, as in the houseleek and the pine cone.
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Origin of parastichy

First recorded in 1870–75; para-1 + stich1 + -y3
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for parastichy

parastichy

noun plural -chies
  1. a hypothetical spiral line connecting the bases of a series of leaves on a stem
  2. an arrangement of leaves so connected
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Compare orthostichy
Derived Formsparastichous, adjective

Word Origin

C19: from para- 1 + Greek stikhia, from stikhos row, rank
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