1) Phase 2) Stage 
<cell biology> Classical term for the third stage of prophase I of meiosis, during which the homologous chromosomes are closely paired and crossing over takes place. ... (18 Nov 1997) ... 
(pak´e-tēn) the third stage of prophase in meiosis I, during which synapsis is complete and genetic material may be exhanged by crossing over.
Classical term for the third stage of prophase I of meiosis, during which the homologous chromosomes are closely paired and crossing-over takes place.
Type: Term Pronunciation: pak′i-tēn Definitions: 1. The stage of prophase in meiosis in which pairing of homologous chromosomes is complete and the paired homologues may twine about each other as they continue to shorten; longitudinal cleavage occurs in each chromosome to form two sister chromatids so that each homologous chromosome pair...
[n] - the third stage of the prophase of meiosis
noun the third stage of the prophase of meiosis