pseudoderm
noun
pseu·do·derm
ˈsüdōˌdərm
plural -s
: an outer covering in various sponges of the class Calcispongiae formed by outgrowth from the peripheral portions of the incurrent canals
pseudodermic
adjective
¦⸗⸗¦dərmik
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Merriam-Webster unabridged
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