STO- 



306 



STR- 



supplying the anterior part of the 

 alimentary canal in Annulates 

 (zool.). 



stomatose, stomatous, stomatif- 

 erous. 



stomidium (stomid'ium) n. [Gk. 

 stoma, mouth.] An aperture rep- 

 resenting the terminal pore of 

 degenerated tentacles of many 

 Actiniaria (zool.). 



stomions (sto'mionz) n. plu. [Gk. 

 stoma, mouth.] The dermal pores 

 or ostia perforating the dermal 

 membrane of a developing Sponge 

 (zool.). 



Btomium (sto'mmm) n. [Gk. stoma, 

 mouth.] A group of thin-walled 

 cells in a fern sporangium where 

 cleavage of the capsule takes place 

 (bot.). 



stomodaeal canal, in Ctenophores, 

 a canal given off by each per-radial 

 canal, and situate parallel to the 

 stomodaeum (zool.). 



stomodaeum (stom'ode'um) n. [Gk. 

 stoma, mouth ; odaios, pert, a way.] 

 The anterior perforated depression 

 communicating with the enteric 

 cavity of many Coelenterates, ecto- 

 derm-lined since formed by in- 

 vagination (zool.) ; the anterior 

 pitted-in portion of the embryonic 

 gut (emb.). 



stone canal, the madreporic canal, 

 an S-shaped cylinder extending 

 from the madrepprite to near the 

 mouth border in Echinoderms 

 (zool.). 



stone cells, sclerotic cells or rounded 

 parenchymatous elements, as found 

 in the pear (dot.). 



strangulated, constricted in places ; 

 contracted and expanded irregu- 

 larly (dot.). 



strata, plu. of stratum. 



stratification (strat'ifika'shun) n. [L. 

 stratum, layer ; facere, to make.] 

 Arrangement in layers ; the super- 

 imposition of layers of epithelium 

 cells (pftys.). 



stratified epithelium, epithelium 

 cells arranged in many super- 

 imposed layers (phys.). 



stratiform (strat'iform) a. [L. stratum, 

 layer ; forma, shape.] Appl. a 

 fibrocartilage which forms a thin 

 coating to osseous grooves, or is 



developed in small masses in some 

 tendons (anat.). 



stratose (strat'os) a. [L. stratum, 

 layer.] Arranged in layers (bot.). 



stratum (stra'tum) n. [L. stratum, 

 a layer.] A layer of cells, tissue, 

 etc. 



stratum compactum, the surface 

 layer of the decidua vera, con- 

 stituting about one-fourth of the 

 entire thickness (emb.). 



stratum corneum, the horny ex- 

 ternal layer of the epidermis 

 (anat.). 



stratum granulosum, the super- 

 ficial layer of the rete mucosum, con- 

 sisting of flattened cells filled with 

 granules of eleidin (anat.). 



stratum lucidum, the layer of cells 

 of indistinct outline between the 

 stratum corneum and the stratum 

 granulosum (anat.). 



stratum spongiosum, the deeper 

 three-fourths of the thickness of 

 the decidua vera (emb.). 



stratum zonale, cinereum, opticum, 

 lemnisci, strata of the anterior 

 corpora quadrigemina, from the 

 surface inwards (anat.). 



streptostylic (strep'tostil'ik) a. [Gk. 

 streptos, pliant ; stylos, a column.] 

 Having the quadrate in movat 

 articulation with the squamosal 

 cf. monimostylic (zool.). 



stria (strl'a) n., striae (strife) pi* 

 [L. stria, funnel, channel.] 

 narrow line, streak, groove, 

 channel. 



striated (strta'ted) a. [L. stria, 

 channel.] Marked by narrow line 

 or grooves, usually parallel. 



striated muscle, bundles of fibr 

 enclosed in a sheath continuot 

 with the tendons ; voluntai 

 muscle, the fibres of which preset 

 transverse striations (anat.). 



stridulate (strid'ulat) v. [L. stridere, 

 to creak.] To make a strident 

 sound like the characteristic son 

 of cicadas. 



stridulating organs, a special ap- 

 paratus on the metathoracic and 

 anterior abdominal segments for 

 producing the song of cicadas ; 

 grasshoppers, spiders, and deca- 

 pod Crustacea also possess stridulat- 

 ing organs (zool.). 



