† pseudambulacrumn.

Inflections: Plural pseudambulacra.

Origin: Formed within English, by compounding. Etymons: pseudo- comb. form, ambulacrum n.

Etymology: < pseudo- comb. form + ambulacrum n. Compare slightly later pseudambulacral adj.

Palaeontology. Obsolete. rare.

Each of the five ambulacra of a blastoid (fossil echinoderm).

ΚΠ

1849 F. M'Coy in Ann. Nat. Hist. 3 249 I use the word pseudambulacra here to designate those poriferous rows in Pentremites, &c. which resemble ambulacra, but the pores of which are found by MM. Roemer and Yondell [read Yandell]..to be really the alimentary canals of a double row of little jointed tentacles resembling I imagine those of Pseudocrinites.

1872 H. A. Nicholson Man. Palæontol. 133 Each pseud-ambulacrum is furrowed by a longitudinal groove.

This entry has been updated (OED Third Edition, September 2007; most recently modified version published online June 2018).

单词	pseudambulacrum
释义	† pseudambulacrumn. Inflections: Plural pseudambulacra. Origin: Formed within English, by compounding. Etymons: pseudo- comb. form, ambulacrum n. Etymology: < pseudo- comb. form + ambulacrum n. Compare slightly later pseudambulacral adj. Palaeontology. Obsolete. rare. Each of the five ambulacra of a blastoid (fossil echinoderm). ΚΠ 1849 F. M'Coy in Ann. Nat. Hist. 3 249 I use the word pseudambulacra here to designate those poriferous rows in Pentremites, &c. which resemble ambulacra, but the pores of which are found by MM. Roemer and Yondell [read Yandell]..to be really the alimentary canals of a double row of little jointed tentacles resembling I imagine those of Pseudocrinites. 1872 H. A. Nicholson Man. Palæontol. 133 Each pseud-ambulacrum is furrowed by a longitudinal groove. This entry has been updated (OED Third Edition, September 2007; most recently modified version published online June 2018). < n.1849
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