PUP- 



266 



PYR- 



insect life ; the stage in insect 

 metamorphosis preceding the imago 

 or adult (zoal.). 



pupal (pu'pal) a. [L. pupa, puppet.] 

 Pert, the pupa stage (zool.). 



puparium (pupa'rium) n. [L. pupa, 

 puppet.] A coarctate pupa ; the 

 pupal instar, exemplified in the 

 blow-fly (zool.). 



pupiform (pu'p!f6rm) a. [L. pupa, 

 puppet ; forma, shape.] Pupa- 

 shaped ; pupa-like. 



pupigerous (pupij'firus) a. {L.. pupa, 

 puppet ; gerere, to bear?) Con- 

 taining a pupa (zool.). 



pupil (pu'pil) n. [L. pupilla, the 

 pupil of the eye.] The aperture of 

 the iris through which rays pass to 

 the retina (anat.). 



pupillary (pupil'ari, pu'pilar!) a. [L. 

 pupilla, pupil of the eye.] Pert. 

 the pupil of the eye ; appl. a mem- 

 brane (anat.). 



pupiparous (pupip'arus) a. [L. pupa, 

 puppet ; parere, to beget.] Bring- 

 ing forth young already developed 

 to the pupa stage, as certain para- 

 sitic Insects (zool.). 



Purkinje, cells of, an incomplete 

 stratum of flask - shaped cells 

 between the two layers of the grey 

 matter of the cerebellum (anat.). 



pustule (piis'tul) n. [L. pustula, 

 pimple.] A blister-like prominence 

 (bot.). 



pusules (pus'ulz) n. plu. [L. pus, 

 matter.] Non-contractile vacuoles 

 consisting of two sacs containing 

 watery fluid, each emptying by its 

 own duct, found in many Dino- 

 flagellates_ (zool.). 



putamen (puta'mfin) n. [L. putamen, 

 pod.] The hard endocarp or stone 

 of some fruits (bot.) ; the lateral 

 part of the lentiform nucleus of the 

 cerebrum (anat.) ; the shell mem- 

 brane of a bird's egg (zool.). 



pycnidiophore (piknid'iofor) n. [Gk. 

 pyknos, dense ; pherein, to bear.] 

 A conidiophore producing pycnidia 

 (bot.). 



pycnidiospore (plkmd'iospor) n. [Gk. 

 pyknos, dense ; sporos, seed.] The 

 spore produced by pycnidia (bot.). 



pycnidium (plknid'ium) n. [Gk. 

 pyknos, dense.] A small flask-shaped 

 organ or spermogoniurn containing 



slender filaments which form 

 pycnidiospores or spermatia by 

 abstriction, a stage in the life- 

 history of wheat rust (bot.). 



pycnium, a pycnidium. 



pycnoconidium, pycnogonidium, 

 pycnospore, varieties of pycnidio- 

 spore (bot.). 



pygal (pi'gal) a. \G\a.pyge, the rump.] 

 Situated at or pert, the posterior 

 end of the back ; appl. certain 

 plates of the chelonian carapace 

 (zool.). 



pygidium (pljld'ium) n. [Gk. pyge, 

 rump.] A caudal shield covering 

 the abdomen of certain Arthropods ; 

 the terminal uncovered abdominal 

 segment of a beetle (zool.). 



pygochord (pl'gokdrd) n. [Gk. pyge, 

 rump ; chorde, cord.] A ventral 

 median ridge-like outgrowth of the 

 intestinal epithelium in certain 

 Enteropneusta (zool.). 



pygostyle (pl'gostll) n. [Gk. pyge, 

 rump ; stylos, column.] An up- 

 turned compressed bone at the end 

 of the vertebral column of Birds, 

 formed by fusion of the four or 

 more hindmost vertebrae (zool.). 



pylocyte (pl'loslt) n. [Gk. pylon, 

 gateway ; kytos, hollow.] A pore- 

 cell at the inner end of a small 

 funnel-shaped depression, the poro- 

 cyte of certain Sponges (zool.). 



pylome 



'loma, 



r lome (pllom') n. [Gk. pylc 

 gate.] In certain Sarcodina, 

 aperture for emission of pseudo- 

 podia and reception of food (zool.). 



pyloric (pilorTk) a. [Gk. pyloros, 

 gate-keeper.] Pert, or in the region 

 of the pylorus ; appl. artery, antrum, 

 glands, orifice, valve, vein (anat.). 



pylorus (pilo'rus) n. [Gk. pyloros, 

 gate-keeper.] The lower orifice of 

 the stomach, communicating with 

 the duodenum (anat.). 



pyramid (pir'amid) n. [L. Pyramis, 

 a pyramid.] A conical structure, 

 protuberance, eminence ; a piece 

 of the dental apparatus of Echinoids 

 (zool.) ; appl. parts of brain, tem- 

 poral bone, vestibule (anat.). 



pyramidal (piram'idal) a. {L.pyranris, 

 a pyramid.] Conical ; like a pyramid ; 

 appl. a carpal bone, brain cells, 

 lobes, processes, muscle (anat.). 



pyrene (pfren, plren') n. [Gk. pyren^ 



