To cross or become crossed so as to form an X; intersect.
Intersected or crossed in the form of an X.
Botany Arranged on a stem in opposite pairs at right angles to those above or below, resulting in four vertical rows: decussate leaves.
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.