“ambulacrum”的英文意思_释义_用法

单词

ambulacrum

释义

‖ ambulacrum|æmbjuːˈleɪkrəm, -ˈækrəm|
Pl. -a.
[L., a walk, avenue; f. ambulā-re to walk.]
An ‘avenue’ or double row of pores for the protrusion of the ambulacral tubes or tube-feet, of which five series radiate from the apex of an echinoderm.
1837Penny Cycl. IX. 259/1 Species [of Echinidæ] whose ambulacra are petaloid, going from a centre..This section is divided into subsections, according to the depth of the ambulacra.1877Huxley Anat. Inv. An. ix. 568 At its apical extremity the ambulacrum is composed of only two small ossicles which meet in the middle line.

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