| ill | 1. Contrary to good, in a physical sense; contrary or opposed to advantage, happiness, etc.; bad; evil; unfortunate; disagreeable; unfavorable. "Neither is it ill air only that maketh an ill seat, but ill ways, ill markets, and ill neighbors." (Bacon) "There 's some ill planet reigns." (Shak) 2. Contrary to good, in a moral sense; evil; wicked; wrong; iniquitious; naughtly; bad; improper. "Of his own body he was ill, and gave The clergy ill example." (Shak) 3. Sick; indisposed; unwell; diseased; disordered; as, ill of a fever. Whatever annoys or impairs happiness, or prevents success; evil of any kind; misfortune; calamity; disease; pain; as, the ills of humanity. Synonym: Bad, evil, wrong, wicked, sick, unwell. Origin: ill, ille, Icel. Illr; akin to Sw. Illa, adv, Dan. Ilde, adv. (11 Mar 1998) |
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| illative | Relating to, dependent on, or denoting, illation; inferential; conclusive; as, an illative consequence or proposition; an illative word, as then, therefore, etc. <logic> Illative conversion, a converse or reverse statement of a proposition which in that form must be true because the original proposition is true. <psychology> Illative sense, the faculty of the mind by which it apprehends the conditions and determines upon the correctness of inferences. Origin: L. Illativus: cf. F. Illatif. (11 Mar 1998) |
| illegal abortion | Termination of pregnancy without legal justification. Synonym: illegal abortion. (05 Mar 2000) |
| illegitimacy | The state of birth outside of wedlock. It may refer to the offspring or the parents. (12 Dec 1998) |
| illegitimate | 1. Not according to law; not regular or authorised; unlawful; improper. 2. Unlawfully begotten; born out of wedlock; bastard; as, an illegitimate child. 3. Not legitimately deduced or inferred; illogical; as, an illegitimate inference. 4. Not authorised by good usage; not genuine; spurious; as, an illegitimate word. 5. <botany> Illegitimate fertilization, or Illegitimate union, the fertilization of pistils by stamens not of their own length, in heterogonously dimorphic and trimorphic flowers. (11 Mar 1998) |
| illicium | <botany> A genus of Asiatic and American magnoliaceous trees, having star-shaped fruit; star anise. The fruit of Illicium anisatum is used as a spice in India, and its oil is largely used in Europe for flavoring cordials, being almost identical with true oil of anise. Origin: So called, in allusion to its aroma, from L. Illicium an allurement. Source: Websters Dictionary (01 Mar 1998) |
| illinition | The friction of a surface to facilitate absorption of an ointment. Origin: L. Il-lino, pp. -litus, to smear on (in + lino) (05 Mar 2000) |
| illinois | <ethnology> A tribe of North American Indians, which formerly occupied the region between the Wabash and Mississippi rivers. Source: Websters Dictionary (01 Mar 1998) |
| illness | 1. The condition of being ill, evil, or bad; badness; unfavorableness. "The illness of the weather." 2. Disease; indisposition; malady; disorder of health; sickness; as, a short or a severe illness. 3. Wrong moral conduct; wickedness. Within the present century, there has been a tendency in England to use illness in the sense of a continuous disease, disorder of health, or sickness, and to confine sickness more especially to a sense of nausea, or "sickness of the stomach." Synonym: Malady, disease, indisposition, ailment. Origin: From Ill. Source: Websters Dictionary (01 Mar 1998) |
| illness, acute | An illness with an abrupt onset and usually a short course. (12 Dec 1998) |
| illness, chronic | An illness that has persisted for a long period of time. It is a continuing disease process. (12 Dec 1998) |
| illuminance | <microscopy> The density of luminous flux incident on a uniformly illuminated area, measured in foot-candles (lumens per square foot) or lux (lumens per square metre). (05 Aug 1998) |
| illuminati | Literally, those who are enlightened; variously applied as follows: 1. Persons in the early church who had received baptism; in which ceremony a lighted taper was given them, as a symbol of the spiritual illumination they has received by that sacrament. 2. Members of a sect which sprung up in Spain about the year 1575. Their principal doctrine was, that, by means of prayer, they had attained to so perfect a state as to have no need of ordinances, sacraments, good works, etc.; called also Alumbrados, Perfectibilists, etc. 3. Members of certain associations in Modern Europe, who combined to promote social reforms, by which they expected to raise men and society to perfection, especially. Of one originated in 1776 by Adam Weishaupt, professor of canon law at Ingolstadt, which spread rapidly for a time, but ceased after a few years. 4. Also applied to: An obscure sect of French Familists. 5. Any persons who profess special spiritual or intellectual enlightenment. Origin: L. Illuminatus, cf. Illuminee. Source: Websters Dictionary (01 Mar 1998) |
| illumination | 1. The act of illuminating, or supplying with light; the state of being illuminated. 2. Festive decoration of houses or buildings with lights. 3. Adornment of books and manuscripts with coloured illustrations. See Illuminate. 4. That which is illuminated, as a house; also, an ornamented book or manuscript. 5. That which illuminates or gives light; brightness; splendor; especially, intellectual light or knowledge. "The illumination which a bright genius giveth to his work." (Felton) 6. The special communication of knowledge to the mind by God; inspiration. "Hymns and psalms . . . Are framed by meditation beforehand, or by prophetical illumination are inspired." (Hooker) Origin: L. Illuminatio: cf. F. Illumination. Source: Websters Dictionary (01 Mar 1998) |
| illumination, critical | <microscopy> The formation of an image of the light source in the object field. The Nelsonian method in which the light source is imaged in the plane of the specimen. A ribbon filament or arc lamp is required to give uniform illumination, the lamp must be focusable, the filament position must be adjustable in all directions. The use of an achromatic condenser is advised. Synonym: Nelson illumination. (13 Jan 1998) |
| commitment of mentally ill | Legal process required for the institutionalization of a patient with severe mental problems. (12 Dec 1998) |
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| terminally ill | Persons with an incurable or irreversible illness at the end stage that will result in death within a short time. (12 Dec 1998) |
| louping ill | <veterinary, virology> An acute tick-borne arbovirus infection causing meningoencephalomyelitis of sheep. (12 Dec 1998) |
| louping-ill virus | A virus of the genus Flavivirus that causes louping ill and is transmitted by the hard tick Ixodes ricinus. (05 Mar 2000) |