GLOSSARY 357 



Tergum. In zoology, the back. 



Terrestrial. Of or inhabiting the land or ground in distinction from trees, water, etc. 



Tibia. In insects, the fourth segment of the leg, articulating proximally with the 



femur and distally with the tarsi. 

 Tracheae. The air-conveying tubules forming the respiratory system of insects and 



other arthropods. 

 Trenchant. Sharp; cutting. 

 Trochanter. In insects, the second segment of the leg, articulating proximally with 



the coxa and distaUy with the femur. 

 Vacuole. A cavity or vesicle in cell protoplasm. 

 Vermicide. A substance which kills worms; a drug to kill parasitic worms of the 



intestines. 

 Vermifuge. A medicine that expels worms from the bodies of animals. 

 Venninous. Infested with worms, or caused by worms, as verminous diseases. 

 Viviparous. Producing living young by true birth, as in mammals, and not by 



hatching from eggs, as in oviparous and ovoviviparous animals; often applied 



to the bringing forth of young which have been hatched from eggs within the 



body of the parent. 

 Zoophyte. Same as phytozoa. 

 Zygote. The encysted stage of certain sporozoans after fertilization by a sperm 



ceU and before division into spores. 



