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a stirrup.] The stirrup - shaped 

 innermost bone of the middle ear 

 (anat.) ; the operculum or in- 

 ternal end of the columella auris, 

 fitting into and filling the fenestra 

 ovalis in Amphibians (zool.). 

 stasimorphy (stas'imor'fi) n. [Gk. 

 stasis, standing ; morphe, form.] A 

 deviation in form due to arrested 

 development (biol.). 



statoblast (stat'oblast) n. [Gk. states, 

 stationary ; blastos, bud.] A special- 

 ized bud or " winter-egg " of some 

 Polyzoa, developed on the funiculus 

 and set free on the death of the 

 parent organism (zoo/.). 



statocone (stat'dkon) n. [Gk. states, 

 stationary ; konos, a cone.] One 

 of the minute structures contained 

 in a statocyst (zool.). 



statocyst (stat'oslst) n. [Gk. states, 

 stationary ; kystis, a bladder.] A 

 vesicle or organ found in Molluscs, 

 Medusae, Crustacea, Worms, with 

 the function of perception of the 

 position of the body in space 

 (zool.}. 



statolith (stat'ollth) . [Gk. states, 

 stationary ; lithos, stone!] A struc- 

 ture of carbonate of lime, sand 

 grain, or secreted substance, con- 

 tained in a statocyst (zoo/.). 



statorhab (stat'orab) n. [Gk. states, 

 stationary ; rhabdos, a rod.] In 

 Trachomedusae, a short tentacular 

 process carrying the statolith 

 (zool.). 



steapsin (steap'sfn) n. [Gk. stear, 

 tallow ; pepsis, digestion.] A diges- 

 tive ferment secreted by the pan- 

 creas (phys.). 



stearin (ste'arin) n. [Gk. stear, tallow.] 

 The solid part of a fat ; a chief 

 component of many fats, animal 

 and vegetable (phys.). 



stegocarpous (steg'okar'pus) a. [Gk. 

 stegetn, to cover ; karpos, fruit.] 

 Having a capsule with operculum 

 and peristome (bot.). 



stelar system, of plants, the vascu- 

 lar and associated conjunctive 

 tissue (fief.). 



stele (stel) n. [Gk. stele, a pillar.] 

 A bulky strand or cylinder of vascu- 

 lar tissue contained in the stem and 

 root of plants, developed from the 

 plerome (bet.). 



stellar, stellate. 



stellate (steTat) a. [L. stella, a star.] 

 Astral ; radiating ; star-shaped ; 

 appl. leaf. 



stellif orm, stellate, 

 stem (st6m) n. [A.S. stemn, a tree- 

 stem.] The trunk of a tree ; the 

 main axis of a plant, 

 stem-cell, in mitosis, a cell in which 

 all the chromatin is preserved, and 

 from which arise the germ cells ; 

 opp. somatic cell (cyt.). 

 stemless, without a stalk ; acaules- 



cent (bet.). 



stemma (st6m'a) n. [Gk. stemma, a 

 garland.] A simple eye or ocellus 

 of Arthropods ; one of the ocelli 

 of an ommatidium (zool.). 

 stenohaline (stgn'ohalln) a. [Gk. 

 stenos, narrow ; halinos, marine.] 

 Appl. marine animals adaptable 

 only to a narrow range of salinity ; 

 cf. euryhaline (zool.). 

 stenopetalous (stgn'opfit'alus) a. [Gk. 

 stenos, narrow ; petalon, a leaf.] 

 With narrow petals, 

 stenophyllous (sten'ofll'us) a. [Gk. 

 stenos, narrow ; phyllon, leaf.] 

 Narrow-leaved. 



stenosepalous (stgn'osep'alus) a. 

 [Gk. stenos, narrow ; sepalon, a 

 sepal.] With narrow sepals, 

 stenostomatous (stn'b'st6m'atus) a. 

 [Gk. stenos, narrow ; sterna, mouth.] 

 Narrow-mouthed. 



stephanion (stSfan'Ion) n. [Gk. Steph- 

 anos, crown.] The point where 

 the superior temporal ridge is 

 crossed by the coronal suture 

 (anal.). 



stercomarium (ste'rkoma'rium) n. [L. 

 stercus, dung.] The system of 

 stercome - containing tubes of 

 certain Sarcodina (zool.). 

 stercome (st6r'kom) n. [L. stercus, 

 dung.] Faecal matter of Sarcodina 

 protoplasm, in masses of brown 

 granules (zool.). 

 stereld bundles, bands or bundles 



of sclerenchymatous fibres (oof.). 

 stereome (steVeom) n. [Gk. stereos, 

 solid.] Sclerenchymatous and col- 

 lenchymatous masses along with 

 hardened parts of vascular bundles 

 forming supporting tissue in plants 

 (**} 

 stereoplasm (steVeoplazm) //. [Gk. 



