n. pl. am·phi·the·ci·a (-shē-ə, -sē-ə) The outer layer of cells of the spore-containing capsule of a moss. [New Latin amphithēcium : AMPHI- + Greek thēkion, diminutive of thēkē, receptacle; see dhē- in the Appendix of Indo-European roots.] |
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.