GLOSSARY OP IMPORTANT TERMS 



421 



Stamen (sta'mgn) : the part of a 

 flower which contains the pollen. 



Sterilized (ster'Mizd) : freed from 

 disease bacteria. 



Stimulus (stlm'u-lws) : an agent 

 capable of producing an impression 

 on a sensory organ. 



Stoma (sto'md) (pi. sto'mci-td) : 

 mouthlike opening in epidermis 

 of green leaf. 



Stratified (strat'I-fld) : arranged in 

 layers. 



Sulphuric (sul-fu'rlk) : acid com- 

 posed of hydrogen, sulphur, and 

 oxygen. 



Tomcelli (t6r're-cheTle) : an Italian 

 physicist who devised the method 

 of measuring atmospheric pressure 

 in 1643. 



Tourniquet (toor'nl-kgt) : a device 

 for arresting bleeding. 



Translucent (trans-lu'snt) : allow- 

 ing some light to pass through, but 

 not enough to permit objects 



to be clearly seen through the sub- 

 stance. 



Transmit (trans-mTt') : to pass on. 



Transparent (trans-par'nt) : allows 

 light to pass through easily. 



Tuberculosis (tu-bur'ku-lo'sls) : an 

 infectious disease of the lungs. 



Vacuum (vak'u-#m) : a space from 



which all air or other matter is 



removed. 

 Vaporization (va'per-I-za'sh&n) : act 



of changing from liquid to a gas. 

 Vaporize (va'per-iz) : to change to a 



vapor. 

 Vegetation (vSj'e"-ta'slmn) : any sort 



of plant life. 

 Veins (vanz) : tubes carrying blood 



back to the heart. 

 Vitamin (vl'td-mm) : regulative food 



substance necessary to life. 



Weathering (w6th'er-ing) : the proc- 

 ess of breaking up and changing 

 rock to soil. 



