noun Cell Biology.
a stage of cell division during the prophase of meiosis, in which the chromosomes are not distinct but appear as a mass of entangled threads.
Origin of leptotene
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
the first stage of the prophase of meiosis during which the nuclear material becomes resolved into slender single-stranded chromosomes
Word Origin for leptotene
C20: from lepto- + -tene, from Greek tainia band, filament
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
The early stage of prophase in meiosis in which the replicated chromosomes contract and become visible as long filaments well separated from one another.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.