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Early stage of prophase in meiosis in which the chromosomes contract and become visible as long filaments well separated from each other.
[lepto- + G. tainia, band, tape]
Etymology: Gk, leptos + nema, thread
the threadlike chromosome formation in the leptotene stage in the first meiotic prophase of gametogenesis, before the beginning of synapsis.
leptonema(lep?to-ne'ma) [? + nema, thread]
The early stage of prophase in meiosis. At this stage the chromatin coils into visible filaments.See: cell division