per·i·the·ci·um (pĕr′ə-thēshē-əm, -sē-əm)
n. pl. per·i·the·ci·a (-shē-ə, -sē-ə)
A small flask-shaped fruiting body in certain ascomycetous fungi that contains the ascospores.
[New Latin : PERI- + Greek thēkion, diminutive of thēkē, case; see dhē- in the Appendix of Indo-European roots.]
per′i·theci·al (-shē-əl, -sē-əl) adj.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.