n. [ Gr. &unr_; other + &unr_; part. ] (Chem.) Variability in chemical constitution without variation in crystalline form. [ 1913 Webster ]

n. [ Gr. &unr_; gill + -mere. ] (Anat.) The state of being made up of branchiate segments. R. Wiedersheim. [ 1913 Webster ]

n.; pl. Ephemerides [ L., a diary, Gr. &unr_;, also, a calendar, fr. &unr_;. See Ephemera. ] 1. A diary; a journal. Johnson. [ 1913 Webster ]

2. (Anat.) (a) A publication giving the computed places of the heavenly bodies for each day of the year, with other numerical data, for the use of the astronomer and navigator; an astronomical almanac; as, the “American Ephemeris and Nautical Almanac.” (b) Any tabular statement of the assigned places of a heavenly body, as a planet or comet, on several successive days. [ 1913 Webster ]

3. (Literature) A collective name for reviews, magazines, and all kinds of periodical literature. Brande & C. [ 1913 Webster ]

n. 1. One who studies the daily motions and positions of the planets. Howell. [ 1913 Webster ]

2. One who keeps an ephemeris; a journalist. [ 1913 Webster ]

pos>n. [ L. Euhemerus, Gr. &unr_; a philosopher, about 300 &unr_;. ] The theory, held by Euhemerus, that the gods of mythology were but deified mortals, and their deeds only the amplification in imagination of human acts. [ 1913 Webster ]

n. One who advocates euhemerism. [ 1913 Webster ]

a. Of or pertaining to euhemerism. [ 1913 Webster ]

n. (Chem.) The state, quality, or relation, of two or more isomeric substances. [ 1913 Webster ]

Physical isomerism (Chem.), a former term for optical isomerism.
optical isomerism (Chem.), the condition or relation of certain (isomeric) substances, which, while chemically identical (in that they have the same composition, the same molecular weights, and the same ultimate constitution), are yet physically different, as in their action on polarized light, as dextro- and lævo-tartaric acids, or the sugars galactose and glucose. In such compounds there is usually at least one unsymmetrical carbon atom and typically more than one. See Unsymmetrical. [ 1913 Webster +PJC ]

a. [ Gr. &unr_; division, fr. &unr_; part. ] (Biol.) Dividing into cells or segments; characterized by separation into two or more parts or sections by the formation of internal partitions; as, merismatic growth, where one cell divides into many. [ 1913 Webster ]

n. [ Gr. &unr_; divisible. ] (Bot.) A tissue of growing cells, or cells capable of further division. [ 1913 Webster ]

n. [ From Mesmer, who first brought it into notice at Vienna, about 1775: cf. F. mesmérisme. ] An earlier name for hypnosis or hypnotism, the art of inducing an extraordinary or abnormal state of the nervous system, in which the actor claims to control the actions, and communicate directly with the mind, of the recipient. It is believed to be a state between sleep and wakefulness, in which a person is more susceptible to suggestion than when awake. See Animal magnetism, under Magnetism. [ 1913 Webster ]

n. One who practices, or believes in, mesmerism. [ 1913 Webster ]

n. 1. (Biol.) The symmetry of a metameric structure; serial symmetry; the state of being made up of metameres. [ 1913 Webster ]

2. (Chem.) The state or quality of being metameric; isomerism due to different bonding patterns in two substances having the same molecular formula. Contrasted with steroisomerism or optical isomerism. Also, the relation or condition of metameric compounds. [ 1913 Webster ]

n. One who deals in numbers. [ Obs. ] Sir T. Browne. [ 1913 Webster ]

n. (Chem.) (a) The state, quality, or relation of two or more polymeric substances. (b) The act or process of forming polymers. [ 1913 Webster ]

n. [ Gr. &unr_;; &unr_;, for &unr_; &unr_; the same + &unr_; part. ] (Chem.) The condition, quality, or relation of metameric substances, or their respective derivatives, which are more or less interchangeable, according as one form or the other is the more stable. It is a special case of metamerism; thus, the lactam and the lactim compounds exhibit tautomerism. [ 1913 Webster ]