GLOSSARY. 



67 



flowing ; not having sufficient force 

 of adhesion in the component parts 

 to prevent their separation by their 

 mere weight readily changing their 

 position. 



Fluidity (Lat. /wo, I flow). The 

 state of being fluid. 



Flu' or, or Fluor-spar. A mineral con- 

 sisting of fluoride of calcium, or the 

 element fluorine with the metallic 

 base of lime. 



Fluoric. Relating to, or containing 

 the element fluorine. 



Flu'oride (Flu'orine). A compound 

 of fluorine with another elementary 

 body. 



Flu'orine (Fluor-spar). An elemen- 

 tary substance which, in combina- 

 tion with calcium, forms fluor- 

 spar. 



Flu'vial (Lat. flu'vius, a river). Be- 

 longing to a river, or fresh water. 



Flu'viatile (Lat. flu'vius, a river). 

 Belonging to a river, or fresh 

 water. 



Flux (Lat. fluo, I flow). A flowing ; 

 a substance used in chemical opera- 

 tions to promote the melting of 

 metals or minerals. 



Fluxion (Lat. fluo, I flow). A flow- 

 ing ; in mathematics, the finding of 

 an infinitely small quantity, which, 

 taken an infinite number of times, 

 becomes equal to a given quantity. 



Flywheel. A wheel used in ma- 

 chinery for the purpose of rendering 

 motion equable and regular. 



Focal. (Lat. /oc?w, a fire-hearth). 

 Relating to a focus. 



Focal Distance. The distance of a 

 focus from some fixed point ; in 

 optics, the distance between the 

 centre of a lens or mirror, and the 

 point into which the rays are 

 collected. 



Focus (Lat. a hearth). A point in 

 which rays meet. 



Folia'ceous (Lat. fo'lium, a leaf). 

 Consisting of, or resembling leaves. 



Foliated (Lat. fo'lium, a leaf). Con- 

 sisting of, or resembling a plate or 

 leaf; arranged in layers like leaves. 



Folia'tion (Lat. fo'lium, a leaf). The 

 arrangement of leaves on a tree. 



Follicle (Lat. follis, a bag). A little 



bag ; in botany, a form of fruit 

 with one suture. 



Follic'ulated (Lat. follic'ulus, a little 

 bag). Having follicles. 



Fon'tanel (Lat. fons, a fountain). The 

 opening in the skull of infants, 

 between the bones, at each end of 

 the sagittal suture. 



Footstalk. The stem of a leaf. 



For'alites (Lat. foro, 1 bore ; Gr. 

 Ai0os, lithos, a stone). Tube-like 

 markings in sandstones and other 

 geological strata, apparently the 

 burrows of worms. 



Fora'men (Lat. foro, I pierce). A 

 hole or aperture. 



Foraminif'erous (Lat. fora'men, a 

 hole ; fero, I bear). Having a 

 hole or holes ; applied to a class of 

 marine animals, having shells con- 

 sisting of chambers separated by 

 partitions having in each a small 

 hole. 



Forma'tion (Lat. formo, I shape or 

 build up). In geology, a term ap- 

 plied to any assemblage of rocks 

 connected by geological position, by 

 immediate succession in time, and 

 by organic and mineral affinities. 



For'miate. (Formic acid). A com- 

 pound of formic acid with a base. 



Formic (Lat. formi'ca, an ant). Be- 

 longing to or obtained from ants : 

 applied to an organic acid pro- 

 curable from ants, and also from 

 the oxidation of wood-spirit under 

 the influence of finely divided 

 platinum. 



Formica'tion (Lat. formi'ca, an ant). 

 A sensation of ants or small insects 

 creeping over the skin. 



For'mula (Lat. forma, a form ; ula, 

 denoting smallness). A form; in 

 mathematics, a general expression 

 by means of letters ; in chemistry, 

 an expression denoting the compo- 

 sition of a substance ; in medicine, 

 a prescription, or directions for 

 making up medicines. 



Fos'sil (Lat. fo'dio, I dig). Dug out 

 of the earth ; in geology, applied 

 generally to mineralised animal and 

 vegetable remains, found in rocks 

 or in the earth. 



Fossilif erous (Lat. fo'dio, I dig ; fero, 

 F 2 



