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GLOSSARY OP IMPORTANT TERMS 



Condensation (k6n'dn-sa'shwn) : 

 changing from gas to liquid. 



Condensed (k<5n-de"nst') : changed 

 from a vapor or gas to a liquid. 



Conduction (kdn-dtik'sh#n) : passing 

 from particle to particle, as heat. 



Conifer (ko'nl-fer) : cone-bearing 

 tree. 



Constellation (k6n'st-la'sh#n) : a 

 group of fixed stars. 



Convection (kon-veVshun) : transfer 

 of heat by currents in gases or 

 liquids. 



Convex (k6n've"ks) : curving out- 

 ward ; opposite to concave. 



Copernicus (ko-pur'nl-kws) : an as- 

 tronomer (1473-1543) who first 

 explained that the apparent rota- 

 tion of the heavens was due to the 

 rotation of the earth. 



Corolla (k6-r51'd) : the inner petals 

 of a flower. 



Corpuscle (kor'ptis'l) : a minute cell 

 in the blood or lymph. 



Cotyledon (k&tl-le'dfln) : the first 

 leaf or pair of leaves developed in 

 seed plants. 



Crustacean (krus-ta'shan) : seg- 

 mented animal with jointed legs 

 and a crustlike shell. 



Cylinder (sil'm-der) : the chamber 

 in an engine in which the piston 

 moves. 



Daguerreotype (dd-ge"r'6-tip) : an 

 early variety of photograph. 



Deciduous (de"-sld'u-ws) : shedding 

 leaves in winter. ^"^ 



Diaphragm (dl'd-fram) : a vibrating 

 disk or membrane as in the tele- 

 phone. Muscular partition sepa- 

 rating the chest cavity from the 

 abdomen. 



Diffused (dl-fuzd') : spread. 



Diffusion (dl-fu'zMn) : the mixing 

 of the particles of two substances 

 in solution. 



Digest (dl-j6sf) : to change food into 

 a form that the blood can absorb. 



Diphtheria (dlf-the'rf-d) : an infec- 

 tious disease of the throat. 



Disinfect (dls'm-fekt') : to purify by 

 killing the germs of disease. 



Distillation (dls'tl-la'shun) : act of 

 driving off gas from liquids and 

 then condensing the gas by cooling. 



Dormant (ddr'mtfnt) : inactive. 



Electrolysis (e-lek-tr6l'l-sls) : the 

 separation of a compound into its 

 parts by means of an electric cur- 

 rent. 



Electron (S-lek'tr&n) : that part of 

 an atom that carries a negative 

 charge of electricity. 



Element (ei'fi-m&it) : a substance 

 that cannot be broken up into 

 simpler substances. 



Embryo (Sm'brl-o) : an organism in 

 early stages of development. 



Emulsion (e-mul'shwn) : a liquid 

 preparation in which minute par- 

 ticles remain in suspension. 



Endocrine (e"n'd6-krin) : organs 

 which secrete fluids. 



Energy (e"n'er-jl) : the capacity to do 

 work. 



Environment (Sn-vl'rftn-mgnt) : sur- 

 rounding conditions or influ- 

 ences. 



Enzyme (e'n'zlm) : a substance which 

 effects certain chemical changes. 



Epidermis (Sp'I-dur'mls) : outer 

 layer of the skin. 



Eradicate (e-rad'I-kaf) : to destroy 

 utterly. 



Erosion (g-ro'zrmn) : the process by 

 which rocks and soil are scoured off 

 and carried away by water. 



Evaporation (e"-vap'6-ra'sh#n) : act 

 of changing a solid or a liquid to a 

 vapor. 



Exhale (Sks-hal') : to breathe out. 



Exhilaration (eg-zfl'd-ra'sh&n) : act 

 of being enlivened or made 

 glad. 



Expiration (Sks'pl-ra'shun) : passing 

 air out of the lungs. 



Explosion (e"ks-plo'zh#n) : a sudden 

 bursting from great pressure. 



Factor (fak'ter) : one of the parts of 

 a product. 



Fahrenheit (fa'rn-hlt) : a thermom- 

 eter in which the freezing point of 

 water is 32 and the boiling point 

 is 212. 



Fatigue (fd-teg') : exhaustion of 

 strength. 



Fermentation (fur-m6n-ta'shiin) : the 

 production of alcohol and carbon 

 dioxide by the action of yeast. 



Fertilization (fur'ti-ll-za'srmn) : the 

 union of a male germ cell with the 

 female germ cell or egg. 



