SPI- 



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SPI- 



spicule (spik'ul) n. [L. spicula, a 

 small spike.] A minute needle- 

 like body, siliceous or calcareous, 

 found extensively in Alcyonaria 

 and other invertebrates (zool.) ; a 

 minute-pointed process (tot.). 



spiculiferous (spikullf'erus) a. [L. 

 spicula, a small spike ; ferre, to 

 carry.] Furnished with or pro- 

 tected by spicules (zool.). 



spiculiform (spik'uliform) a. [L. 

 spicula, a small spike ; forma, 

 shape.] Spicule-shaped. 



spiculigenous, spiculigerous, spicu- 

 lose, spiculiferous. 



spiculum (spik'ulum) n. [L. spicula, 

 a small spike.] A spicular structure ; 

 the dart of a Snail (zoo/.). 



spike (splk) n. [L. spica, a spike.] 

 An inflorescence with sessile 

 flowers along the axis, as in 

 Plantago (tot.). 



spikelet (splk'lgt) n. [L. spica, a 

 spike.] A secondary spike of 

 Grasses, bearing few flowers (tot.). 



spinal (spi'nal) a. [L. spina, the 

 spine.] Pert, the backbone or 

 vertebral column ; appl. foramen, 

 ganglion, nerves (anat.). 



spinal canal, the canal containing 

 the spinal cord, formed by the 

 neural arches (anat.). 



spinal cord, the nervous tissue con- 

 tained in the spinal or vertebral 

 canal (anat.). 



spinalis (spina'lis) n. [L. spina, 

 spine.] Name given to muscles, 

 as spinalis dorsi and spinalis cer- 

 vicis, muscles connecting up the 

 vertebrae (anat.). 



spinate (spi'nat) a. [L. spina, a 

 thorn.] Spine-shaped; spine-bear- 

 ing. 



spindle (spin'dl) n. [A.S. spinnan, 

 to spin.] A structure resembling 

 a spinning-machine spindle ; an 

 elongated peduncle bearing sessile 

 flowers (tot.) ; a spindle-shaped 

 structure formed of achromatin 

 fibres during mitosis (tiol.). 



spine (spin) n. [L. spina, the spine.] 

 The backbone ; the vertebral 

 column ; a sharp-pointed process 

 or outgrowth as found on leaves, 

 Echinoids, Porcupines ; the pointed 

 process of a vertebra ; the scapular 

 ridge ; a fin -ray. 



spinescent (splnes'ent) a. [L. spi- 

 nescere, to become spiny.] Taper- 

 ing ; tending to become spiny. 



spiniferous (spl'nif'erus) a. [L. 

 spina, a spine ; ferre, to carry.] 

 Furnished with spines. 



spiniform (spi'mform) a. [L. spina, 

 spine ; forma, shape.] Spine- 

 shaped. 



spinigerous (splnlj'erus) a. [L. spina, 

 spine ; gerere, to carry.] Spine- 

 bearing. 



spinneret (spin'ergt) n. [A.S. spinnan, 

 to spin.] In Spiders, one of the 

 movable organs perforated by tubes 

 connected with glands secreting 

 liquid silk, they arise from modi- 

 fications of abdominal appendages, 

 and lie slightly anterior to the anus 

 (zool.). 



spinnerule (spm'erul) n. [A.S. spin- 

 nan, to spin.] One of the tubes 

 for discharging the silk solution of 

 Spiders (zool.). 



spinning glands, glands which 

 secrete material for webs in Spiders, 

 and for cocoons in caterpillars. 



spinose (spl'nos) a. [L. spina, a 

 spine.] Bearing many spines. 



spinpus (spl'nus) a. [L. spina, a 

 spine.] Spiny ; spine-like. 



spinous process, the median dorsal 

 spinelike process of each vertebra ; 

 a process of the sphenoid ; a pro- 

 cess between the articular surfaces 

 of the proximal end of the tibia 

 (anat.). 



spinulate (spln'ulat) a. [L. spinula, 

 a small spine.] Covered with small 

 spines. 



spinulation (spinula'shun) n. [L. 

 spinula, a small spine.] A de- 

 fensive spiny covering ; state of 

 being spinulate. 



spinule (spin'ul) n. [L. spinula, a 

 small spine.] A small spine. 



spinulescent (spmulgs'Snt) a. [L. 

 spinula, a small spine.] Tending 

 to be spiny. 



spinuliferous (spmulif'e'rus) a. [L. 

 spinula, a small spine ; ferre, to 

 bear.] Bearing small spines. 



spinulose, spinulous, spinuliferous. 



spiny-finned, bearing fins with spiny 

 rays for support. 



spiny-rayed, appl. fins supported by 

 spiny rays. 



