724 GLOSSARY. 



Fibrinogen. A form of globulin obtained from serous fluids, which, 



on being added to a liquid containing serum globulin, gives rise to 



the formation of fibrin. 

 Fibrinoplastin. A term sometimes applied to paraglobulin or serum 



globulin. 

 Filiform. A name given to a certain class of the papillae of the tongue, 



the points of which taper off to a thread. 

 Foetus. The fully-formed embryo while in the uterus or egg. 

 Fungiform. A name given to a certain class of papillae of the tongue, 



which are shaped like a toadstool. 



Galvanometer. An instrument for measuring the direction and 



strength of electric currents by means of the deflection of a magnetic 



needle. 

 Ganglion. A swelling. Chiefly used to denote swellings on nerves 



which contain nerve corpuscles. Hence any group or mass of nerve 



cells. 



Gastrula. A stage in the development of animals in which they con- 

 sist of a small sack composed of two layers of cells. 

 Gemmation. Budding a process of reproduction in which a bud 



forms on the parent organism, and finally separates as a distinct being. 

 Globulin. A form of albumin insoluble in pure water but soluble in 



weak solutions of common salt. 

 Glomerulus. A bundle of capillary loops which form part of the Mal- 



pighian body of the kidney. 

 Glyoocholic acid. An acid existing in large quantities combined 



with soda in the bile of herbivorous animals, and in lesser quantities 



in man. 

 Glycogen. Animal starch ; a substance belonging to the carbohydrates, 



which is made in the liver. It may be readily converted into grape 



sugar, from which fact its name is derived. 

 Gustatory. Pertaining to the sense of taste. 



Hsematin. A dark-red, amorphous body containing iron ; obtained from 

 the decomposition of the coloring matter of the blood (hemoglobin). 



Hsemin. Hydrochlorate of haematin ; easily obtained, as small, dark 

 crystals, by boiling blood to which some common salt and glacial 

 acetic acid have been added. 



Holoblastic. The form of ova the entire yelk of which enters into 

 the process of segmentation. 



Homceothermic. Even temperatured ; a term applied to those animals 

 that keep up a regular temperature, independent of their surround- 

 ings ; warm-blooded animals. 



