212 ZOO 



Wheel-shaped. See Rotate. 



Wliorled. Having flowers or leaves growing in a ring. 

 Wings. The two side petals of a papilionaceous flower. 

 Wood. The most solid parts of trunks of trees and shrubs. 



Z. 



Zoology. The science which treats of animals. 



Zo'ophytes. The lowest order of animals, sometimes called animal 

 plants, though considered as wholly belonging to the animal king- 

 dom. They resemble plants in their form, aj"4 exhibit veiy faint 

 marks of sensation. 



