impedance angle |
A term expressing the ratio of electric resistance to electric capacitance (ohms to microfarads) in the tissues of the body or any other substance. (05 Mar 2000) |
|---|---|
impedance method |
A method for localizing brain structures by measuring impedance of electric current. (05 Mar 2000) |
impenetrability |
1. Quality of being impenetrable. 2. <physics> That property in virtue of which two portions of matter can not at the same time occupy the same portion of space. 3. Insusceptibility of intellectual or emotional impression; obtuseness; stupidity; coldness. Origin: Cf. F. Impenetrabilite. Source: Websters Dictionary (01 Mar 1998) |
impenetrable |
1. Incapable of being penetrated or pierced; not admitting the passage of other bodies; not to be entered; impervious; as, an impenetrable shield. "Highest woods impenetrable To star or sunlight." (Milton) 2. <physics> Having the property of preventing any other substance from occupying the same space at the same time. 3. Inaccessible, as to knowledge, reason, sympathy, etc.; unimpressible; not to be moved by arguments or motives; as, an impenetrable mind, or heart. "They will be credulous in all affairs of life, but impenetrable by a sermon of the gospel." (Jer. Taylor) Origin: L. Impenetrabilis; pref. Im- not + penetrabilis penetrable: cf. F. Impenetrable. Source: Websters Dictionary (01 Mar 1998) |
impenitence |
The condition of being impenitent; failure or refusal to repent; hardness of heart. "He will advance from one degree of wickedness and impenitence to another." (Rogers) Origin: L. Impenitentia: cf. F. Impenitence. Source: Websters Dictionary (01 Mar 1998) |
impenitent |
Not penitent; not repenting of sin; not contrite; of a hard heart. "They . . . Died impenitent." . "A careless and impenitent heart." . Origin: L. Impaenitens; pref. Im- not + paenitens penitens: cf. F. Impenitent. See Penitent. Source: Websters Dictionary (01 Mar 1998) |
impennate |
<zoology> Characterised by short wings covered with feathers resembling scales, as the penguins. One of the Impennes. Source: Websters Dictionary (01 Mar 1998) |
impennes |
<ornithology> An order of birds, including only the penguins, in which the wings are without quills, and not suited for flight. Origin: NL, fr. L. Pref. Im- not + penna feather. Source: Websters Dictionary (01 Mar 1998) |
impennous |
<zoology> Having no wings, as some insects. Origin: L. Pref. Im- not + penna wing. Source: Websters Dictionary (01 Mar 1998) |
imperative conception |
A concept that does not arise from association but appears spontaneously and refuses to be banished. (05 Mar 2000) |
imperator |
A commander; a leader; an emperor; originally an appellation of honor by which Roman soldiers saluted their general after an important victory. Subsequently the title was conferred as a recognition of great military achievements by the senate, whence it carried wiht it some special privileges. After the downfall of the Republic it was assumed by Augustus and his successors, and came to have the meaning now attached to the word emperor. Origin: L. See Emperor. Source: Websters Dictionary (01 Mar 1998) |
imperception |
Inability to form a mental image of an object by combining the sensory data obtained therefrom. Origin: L. In-, not, + per-cipio, pp. -ceptus, to perceive (05 Mar 2000) |
imperfect flower |
A flower containing stamen and pistil organs required for pollination but lacking sepals or petals or both of these organs. (09 Oct 1997) |
imperfect fungus |
A fungus in which the means of sexual reproduction is not yet recognised; these fungi generally reproduce by means of conidia. Perfect fungus, a fungus possessing both sexual and asexual means of reproduction, and in which both mating forms are recognised. Ray fungus, a bacterium which is a member of the order Actinomycetales. (05 Mar 2000) |
imperfect stage |
A mycological term used to describe the asexual life cycle phase of a fungus. See: anamorph. (05 Mar 2000) |