hydrophob 



HZ 



half-life period. 



hydrophob non-hygroscopic, non- 

 absorbent, water- or moisture re- 

 pellent. 



Hyperebene hyperplane. 



hyperfeine Struktur hyperfine struc- 

 ture. 



Hyperfunktion hyperbolic function. 

 Hysteresemesser hysteresis meter. 



-.schreibender hysteresigraph. 

 HZ (Hertz) cycle per second, Hertz 



unit (of frequency). 



