igneous
igneous: adj.
1 of fire; fiery.
2 Geol. (esp. of rocks) produced by volcanic or magmatic action. [L igneus f. ignis fire]

illuminate
illuminate: v.tr.
1 light up; make bright.
2 decorate (buildings etc.) with lights as a sign of festivity.
3 decorate (an initial letter, a manuscript, etc.) with gold, silver, or brilliant colours.
4 help to explain (a subject etc.).
5 enlighten spiritually or intellectually.
6 shed lustre on. øøilluminating adj. illuminatingly adv. illumination n. illuminative adj. illuminator n. [L illuminare (as IN-(2), lumen luminis light)]

illuminati
illuminati: n.pl.
1 persons claiming to possess special knowledge or enlightenment.
2 (Illuminati) hist. any of various intellectual movements or societies of illuminati. øøilluminism n. illuminist n. [pl. of L illuminatus or It. illuminato past part. (as ILLUMINATE)]

intelnet
ionizer
ionizer: n. any thing which produces ionization, esp. a device used to improve the quality of the air in a room etc.

iatrogenic
iatrogenic: adj. (of a disease etc.) caused by medical examination or treatment. [Gk iatros physician + -GENIC]

interest
interest: n. & v. --n.
1 a concern; curiosity (have no interest in fishing). b a quality exciting curiosity or holding the attention (this magazine lacks interest).
2 a subject, hobby, etc., in which one is concerned (his interests are gardening and sport).
3 advantage or profit, esp. when financial (it is in your interest to go; look after your own interests).
4 money paid for the use of money lent, or for not requiring the repayment of a debt.
5 (usu. foll. by in) a a financial stake (in an undertaking etc.). b a legal concern, title, or right (in property).
6 a a party or group having a common interest (the brewing interest). b a principle in which a party or group is concerned.
7 the selfish pursuit of one's own welfare, self-interest. --v.tr.
1 excite the curiosity or attention of (your story interests me greatly).
2 (usu. foll. by in) cause (a person) to take a personal interest or share (can I interest you in a holiday abroad?).
3 (as interested adj.) having a private interest; not impartial or disinterested (an interested party). øat interest (of money borrowed) on the condition that interest is payable. declare an (or one's) interest make known one's financial etc. interests in an undertaking before it is discussed. in the interest (or interests) of as something that is advantageous to. lose interest become bored or boring. with interest with increased force etc. (returned the blow with interest). øøinterestedly adv. interestedness n. [ME, earlier interesse f. AF f. med.L, alt. app. after OF interest, both f. L interest, 3rd sing. pres. of interesse matter, make a difference (as INTER-, esse be)]

inference
inference: n.
1 the act or an instance of inferring.
2 Logic a the forming of a conclusion from premisses. b a thing inferred. øøinferential adj. inferentially adv. [med.L inferentia (as INFER)]

inferno
inferno: n. (pl. -os.
1 a raging fire.
2 a scene of horror or distress.
3 hell, esp. with ref. to Dante's Divine Comedy. [It. f. LL infernus (as INFERNAL)]

illuminant
illuminant: n. & adj. --n. a means of illumination. --adj. serving to illuminate. øøilluminance n. [L illuminant- part. stem of illuminare ILLUMINATE]