amphitheciumWiktionary 原文英美构词拆解amphiamphi-前缀theciumthecium词干amphi-Located on the opposite side of, or referring to two distinct sides or ends of a region or object. · Either, both; having two distinct properties and able to function as either.词源说明From amphi- + thecium.释义名词noun1The thalline margin of a lecanorine apothecium.2The external cell layers of the developing sporangium of a bryophyte.