GLOSSARY. 



87 



Il'io- (Ilium}. In anatomy, a prefix 

 denoting connection with, or rela- 

 tion to, the iliac bone. 



Ilium (Lat. i'lia, the flank). The 

 large partly flattened bone which 

 forms the principal part of the 

 pelvis, and enters into the compo- 

 sition of the hip-joint. 



lUa'tive (Lat. in, 'on; la'tus, borne). 

 Denoting an inference ; applied in 

 logic, where the truth of the con- 

 verse follows from the truth of the 

 proposition itself. 



Ima'go (Lat. an image). A name 

 given to the perfect state of an 

 insect. 



Imbecility (Lat. in, on ; bacil'lus, a 

 staff). Weakness : a defective 

 state of intellect, not amounting to 

 idiocy. 



Im'bricate (Lat. imbrex, a tile). 

 Lying over each other like tiles ; 

 in botany, applied to the arrange- 

 ment in the bud in which the outer 

 leaves successively overlap the 

 inner. 



Immer'sion (Lat. in, in; mergo, I 

 dip). A putting beneath the sur- 

 face, as of a fluid ; in astronomy, 

 the entrance of one body into such 

 a position with regard to another, 

 as to apparently sink into it, and 

 become invisible. 



Im'pact (Lat. in, on ; pango, I drive). 

 A stroke ; the action of two bodies 

 on each other in coming together. 



Impal'pable (Lat. in, not ; palpo, I 

 feel). Incapable of being felt. 



Imparisyllab'ic (Lat. in, not : par, 

 equal ; syl'laba, a syllable). Not 

 having the same number of sylla- 

 bles ; applied to nouns which have 

 not the same number of syllables 

 in all their cases. 



Impenetrability (Lat. in, not ; peri- 

 etro, I pierce). In physics, the 

 property in virtue of which a body 

 occupies a certain space, which 

 cannot at the same time be occu- 

 pied by another body. 



Imperative (Lat. im'pero, I com- 

 mand). Commanding ; in gram- 

 mar, implying a command or en- 

 treaty. 



Imper'meable (Lat. in, not; per, 



through ; meo, I pass). Incapable 

 of being passed through by a fluid. 



Imper'sonal (Lat. in, not ; perso'na, 

 a person). Without persons ; ap- 

 plied to verbs which have only the 

 third person singular. 



Imper'vious (Lat. in, not ; per, 

 through ; via, a way). Incapable 

 of being passed through. 



Impeti'go (Lat. im'pelo, I attack). 

 A disease of the skin characterised 

 by clusters of pustules which run 

 together into a crust ; a running 

 tetter. 



Im'petus (Lat. from in, against ; peto, 

 I urge). The force with which a 

 body is driven. 



Imping'e (Lat impin'go, I strike 

 against). To strike or dash 

 against. 



Implu'vium (Lat. in; plu'via, rain). 

 A basin to receive rain, in the 

 middle of the atrium or court- 

 yard of ancient Roman houses. 



Impon'derable (Lat. in, not ; pon- 

 dus, weight). Without perceptible 

 weight. 



Impulse (Lat. in, on or against; 

 pello, I drive). The effect of one 

 body striking on another, being 

 the result of the motion of the 

 striking body. 



Impulsion (Lat. in, against ; pello, 

 I drive). The act of driving 

 against : the process by which a 

 moving body changes the motion 

 of another by striking it. 



Inanimate (Lat. in, not ; ariima, 

 animal life). Without animal life. 



Inanition (Lat. ina'nis, empty). 

 Emptiness ; want of nutrition ; 

 starvation. 



Inartie'ulate (Lat. in, not ; artic'- 

 ulas, a joint). Not having the 

 power of articulation or speech ; 

 in botany, without joints, 



Incandes'cence (Lat. in; candes'co, 

 I grow white). A white heat ; 

 the luminous appearance which 

 bodies assume when heated to a 

 certain point. 



Incandes'cent (Lat. in; candes'co, I 

 grow white). White or glowing 

 from heat. 



Incep'tive (Lat. incip'io, I begin). 



