Appendix III 359 



Philology, Gr. philos, loving ; logos, word (the study of language) 



Photosphere, Gr. phos, light ; sphaira, a sphere 



Physiography, Gr. phusis, nature ; grapho, to describe 



Plane, L. plamts, even, smooth 



Planet, Gr. planetes, a wanderer 



Pleistocene, Gr. pleistos, most ; kainos, recent 



Plesiosaurus, Gr. plesios, near to ; saura, a lizard 



Pliocene, Gr. pleion, more ; kainos, recent 



Porifera, L. porus, a pore ; fero, to carry 



Potential, L. potens, being able 



Proteid, Gr. protos, first 



Protophyta, Gr. protos, first ; phuton, plant 



Protoplasm, Gr. protos, first ; plasma, form 



Protozoa, Gr. protos, first ; zoon, animal 



Pterodactyl, Gr. pteron, wing ; daktulos, finger 



Pteropod, Gr. pteron, wing ; podes, feet 



RADIATION, L. radio, to radiate 

 Radius, L. radius, a rod, ray 

 Rarefaction, L. rarus, rare ; facio, to make 

 Reflection, L. ;-, back ; flecto, to bend 

 Refraction, L. re, back ; frango, to break 

 Rotation, L. 7-0/0, to turn 



SATELLITE, L. satelles, an attendant 



Saurian, Gr. saura, a lizard 



Secretion, L. secretus, from ^, apart ; cerno, to separate 



Sedimentary, L. sedimentum, from j*0, to sit, to settle 



Sequence, L. sequor, to follow 



Sidereal, L. V/#.y, a star 



Solstice, L. sol, the sun ; sto, to stand 



m J L ' r ^^' to look ( that which is seen ) 

 Spicule, L. spicuhun, a point 

 Stalactite, Gr. stalaktos, dropping 

 Stalagmite, Gr. stalagtnos, a dropping 



StratuM//. strata), } L ' 5te > ^^^ to s ? read out 

 Subtend, L. ^w^, under ; tendo, to stretch 

 Syncline, Gr. sun, together ; klino, to lean or incline 

 Synoptic, Gr. sun, with ; opsis, a view 



