perfect stage

noun Mycology.
  1. a phase in the life cycle of certain fungi in which sexual spores are formed, as the asci in the sexual stage of the ascomycete.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

perfect stage in Medicine

perfect stage

n.
  1. The sexual phase in the life cycle of a fungus in which spores are produced following nuclear fusion.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.