| iris | (noun) diaphragm consisting of thin overlapping plates that can be adjusted to change the diameter of a central opening | Synonyms: iris diaphragm |
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| (noun) muscular diaphragm that controls the size of the pupil which in turn controls the amount of light that enters the eye; it forms the colored portion of the eye | - |
| (noun) plants with sword-shaped leaves and erect stalks bearing bright-colored flowers composed of three petals and three drooping sepals | Synonyms: flag, fleur-de-lis, sword lily |
| oneirism | (noun) absentminded dreaming while awake | Synonyms: air castle, castle in Spain, castle in the air, daydream, daydreaming, reverie, revery |
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| satirist | (noun) a humorist who uses ridicule and irony and sarcasm | Synonyms: ironist, ridiculer |
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| siris | (noun) large spreading Old World tree having large leaves and globose clusters of greenish-yellow flowers and long seed pods that clatter in the wind | Synonyms: Albizia lebbeck, Albizzia lebbeck, siris tree |
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| vampirism | (noun) the actions or practices of a vampire | - |
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| (noun) belief in the existence of vampires | - |