674 FUNDAMENTALS OF FRUIT PRODUCTION 



GLOSSARY 



Adiabattc. — A curve exhibiting variations of pressure and volume of a fluid when 



it expands without receiving or losing heat. 

 Adsorption. — The adhesion of molecules of gases or dissolved substance to the sur- 

 faces of solid particles; distinguished from absorption, which is not a surface 

 phenomenon. 

 Aitionomic. — As referred to parthenocarpy, the ability to develop parthenocarpic 



fruits only in response to some stimulus external to the ovary. 

 Akene. — Dry, unilocular, indehiscent fruit, seed-like in appearance, as in the straw- 

 berry. 

 Alkali. — (1) In chemistry, a base; (2) as applied to soils, salts present in amounts 

 harmful to plants, chiefly sodium chloride, sodium sulfate and sodium 

 carbonate. 

 Antagonism. — Of salts, a mutual counteraction of their influence on cell permeability. 

 Arginine. — A basic amino-acid which is a product of protein digestion. 

 Autocatalysis. — A process of catalysis where the catalytic agent is an end product 



of the reaction catalyzed. 

 Autogamy. — When a flower is fertilized by its own pollen. 

 Autonomic. — As referred to parthenocarpy, the ability to set fruit without the 



stimulus resulting from pollination. 

 Barren. — Unproductive. 



Breba. — One of the crops of the pistillate fig tree, the first to mature in the spring. 

 Caprifig. — The wild or "male" fig, the uncultivated form. 

 Chemotropism.— A bending or turning in response to a chemical stimulus. 

 Chlorosis. — A diseased condition shown by loss of green color. 

 Choline. — An amine arising as one of the products of lecithin decomposition. 

 Colloid. — A state of a substance where the units are very large molecules or molecule 

 complexes. Colloids diffuse slowly or not at all through plant or animal mem- 

 branes. 

 Compatibility. — (1) Of sex cells, the ability to unite and form a fertilized egg that 

 can grow to maturity. (2) Congeniality as determined by the degree of success 

 of the union between stock and cion. 

 Coulure. — The failure of blossoms to set, resulting in a premature drop. Cf. 



millerandage. 

 Court-noue. — A physiological disturbance of the grape manifested by short nodes. 

 Creatine. — A nitrogenous compound readily converted into creatinine. 

 Creatinine. — A basic nitrogenous compound occuring naturally in muscle tissue and 



urine. 

 Cumarine. — An organic compound with vanilla-like odor known as tonka bean 



camphor. 

 Dichogamy. — Insuring cross fertilization by the sexes being developed at different 



times. 

 Dicliny. — Male and female organs separate and in different flowers. 

 Dihydroxy-stearic Acid. — A double hj^droxide of a common fatty acid. 

 Dimorphism. — Presenting two forms, as long and short growths or permanent and 



deciduous branches. 

 Dioecious. — Unisexual, the male and female elements in different individuals. 

 Disaccharide. — A compound sugar yielding two simple sugars on hydrolysis. 

 Dormant. — Applied to buds when they are not actively growing and to plants when 



they are not in leaf. 

 Emasculation. — The artificial removal of the stamens from the flower before they 

 dehisce. 



