† pseudocoelianadj.AnatomyObsoleterare (in the terminology of B. G. Wilder) designating the surface of the cavity of the septum pellucidum of the brain.
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1889 B. G. Wilder in A. H. Buck Ref. Handbk. Med. Sci. VIII. 136/1 Three kinds of surfaces..viz.: entocœlian, lined by endyma; ectocœlian, covered by pia; and pseudocœlian, with no distinct membrane.