paxillan.

Brit.

/pakˈsɪlə/, U.S.

/pækˈsɪlə/

Inflections: Plural paxillae.

Origin: A borrowing from Latin. Etymon: Latin paxilla.

Etymology: < scientific Latin paxilla < classical Latin paxillus small stake, peg (see paxillus n.).

Zoology.

An ossicle in the endoderm of the aboral surface of some starfishes, having a column-like part projecting above the body surface which has a flattened top covered with small hinged spines which may be lowered to create a cavity next to the aboral surface.

ΘΚΠ

the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Echinodermata > [noun] > member of > parts of > ambulacrum > pillarlike

paxilla1870

paxillus1890

1870 G. Rolleston Forms Animal Life 142 The spines..may carry a coronet of numerous calcified setae on their apices when they are called ‘paxillae’.

1878 F. J. Bell & E. R. Lankester tr. C. Gegenbaur Elements Compar. Anat. 206 The incompletely calcified stalk of the pedicellaria corresponds to the stalk of the paxilla of the Asterida.

1950 R. W. Miner Field Bk. Seashore Life xiii. 702 The paxillae on the upper side of the disc thickly cover the surface with their cylindrical stems, from the top of which radiate spinules to form a starlike cluster, interlocking with those of neighboring paxillae when extended.

1994 E. E. Ruppert & R. D. Barnes Invertebr. Zool. (ed. 6) xviii. 928/2 Adjacent paxillae create a protective space above the aboral integument.

Derivatives

paˈxillar adj. of or relating to a paxilla or paxillae.

ΘΚΠ

the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Echinodermata > [adjective] > belonging to or resembling echinoderms > of parts of > of or relating to ambulacra > of or relating to or having a pillar-like pedicel

paxillar1890

paxillose1895

paxillary1951

1890 Cent. Dict. Paxillar.

1900 Proc. Zool. Soc. 292 Paxillar crowns are very large and oval.

1981 Steenstrupia 7 310 Almost every one of the small dorsal plates (paxillar shafts) bears a spinelet.

paˈxillate adj. rare bearing paxillae.

ΚΠ

1890 Cent. Dict. Paxillate.

1995 Systematic Biol. 44 208/2 Abactinal ossicles. 0 = imbricate and stellate or paxillate; 1 = tabulate and tesselate.

paˈxilliform adj. having the shape of a paxilla.

ΚΠ

1889 W. P. Sladen in Rep. Sci. Results Voy. H.M.S. Challenger: Zool. 30 286 Plates of the abactinal area more or less truly paxilliform.

1995 Systematic Biol. 44 201/1 It is also likely that differentiation of the calycinal ring in early development and the possession of paxilliform actinal ossicles are also plesiomorphic for crown group asteroids.

This entry has been updated (OED Third Edition, September 2005; most recently modified version published online March 2022).

单词	paxilla
释义	paxillan. Brit. /pakˈsɪlə/, U.S. /pækˈsɪlə/ Inflections: Plural paxillae. Origin: A borrowing from Latin. Etymon: Latin paxilla. Etymology: < scientific Latin paxilla < classical Latin paxillus small stake, peg (see paxillus n.). Zoology. An ossicle in the endoderm of the aboral surface of some starfishes, having a column-like part projecting above the body surface which has a flattened top covered with small hinged spines which may be lowered to create a cavity next to the aboral surface. ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Echinodermata > [noun] > member of > parts of > ambulacrum > pillarlike paxilla1870 paxillus1890 1870 G. Rolleston Forms Animal Life 142 The spines..may carry a coronet of numerous calcified setae on their apices when they are called ‘paxillae’. 1878 F. J. Bell & E. R. Lankester tr. C. Gegenbaur Elements Compar. Anat. 206 The incompletely calcified stalk of the pedicellaria corresponds to the stalk of the paxilla of the Asterida. 1950 R. W. Miner Field Bk. Seashore Life xiii. 702 The paxillae on the upper side of the disc thickly cover the surface with their cylindrical stems, from the top of which radiate spinules to form a starlike cluster, interlocking with those of neighboring paxillae when extended. 1994 E. E. Ruppert & R. D. Barnes Invertebr. Zool. (ed. 6) xviii. 928/2 Adjacent paxillae create a protective space above the aboral integument. Derivatives paˈxillar adj. of or relating to a paxilla or paxillae. ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Echinodermata > [adjective] > belonging to or resembling echinoderms > of parts of > of or relating to ambulacra > of or relating to or having a pillar-like pedicel paxillar1890 paxillose1895 paxillary1951 1890 Cent. Dict. Paxillar. 1900 Proc. Zool. Soc. 292 Paxillar crowns are very large and oval. 1981 Steenstrupia 7 310 Almost every one of the small dorsal plates (paxillar shafts) bears a spinelet. paˈxillate adj. rare bearing paxillae. ΚΠ 1890 Cent. Dict. Paxillate. 1995 Systematic Biol. 44 208/2 Abactinal ossicles. 0 = imbricate and stellate or paxillate; 1 = tabulate and tesselate. paˈxilliform adj. having the shape of a paxilla. ΚΠ 1889 W. P. Sladen in Rep. Sci. Results Voy. H.M.S. Challenger: Zool. 30 286 Plates of the abactinal area more or less truly paxilliform. 1995 Systematic Biol. 44 201/1 It is also likely that differentiation of the calycinal ring in early development and the possession of paxilliform actinal ossicles are also plesiomorphic for crown group asteroids. This entry has been updated (OED Third Edition, September 2005; most recently modified version published online March 2022). < n.1870
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