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calyptera. In DICTIOUS you will not only get to know all the dictionary meanings for the word
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English
Noun
calyptera (plural calypteras)
- Alternative form of calyptra
1938, Gilbert Morgan Smith, Cryptogamic Botany, page 56:When the sporophyte has attained about a quarter of its eventual length, it pushes through the apex of the calyptera and grows upward above the perianth (Fig. 32B).
1995, Richard Kent Schaefers, Nucellar Somatic Embryogenesis:Because the calyptera protects the ovule from injury by surface sterilization treatments, a 1-2% sodium hypochlorite (« 10-20% household bleach) with .01% Tween-20 may be used for 10-15 minutes with vigorous shaking.
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