| beseechingness | (noun) The state or quality of one who begs or implores. | - |
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| catechin | (noun) a tannic acid that is extracted from black catechu as a white crystalline substance | - |
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| catechism | (noun) an elementary book summarizing the principles of a Christian religion; written as questions and answers | - |
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| (noun) a series of questions put to an individual (such as a political candidate) to elicit their views | - |
| catechist | (noun) one who instructs catechumens in preparation for baptism (especially one using a catechism) | - |
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| echidna | (noun) a burrowing monotreme mammal covered with spines and having a long snout and claws for hunting ants and termites; native to Australia | Synonyms: anteater, spiny anteater |
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| (noun) a burrowing monotreme mammal covered with spines and having a long snout and claws for hunting ants and termites; native to New Guinea | Synonyms: anteater, spiny anteater |
| echinocactus | (noun) any cactus of the genus Echinocactus; strongly ribbed and very spiny; southwestern United States to Brazil | Synonyms: barrel cactus |
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| echinococcosis | (noun) infestation with larval echinococci (tapeworms) | Synonyms: hydatid disease, hydatidosis |
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| echinococcus | (noun) tapeworms whose larvae are parasitic in humans and domestic animals | - |
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| echinoderm | (noun) marine invertebrates with tube feet and five-part radially symmetrical bodies | - |
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| echinus | (noun) ovolo molding between the shaft and the abacus of a Doric column | - |
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| gelechiid | (noun) small slender-winged moths whose larvae are agricultural pests | Synonyms: gelechiid moth |
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| obechi | (noun) large west African tree having large palmately lobed leaves and axillary cymose panicles of small white flowers and one-winged seeds; yields soft white to pale yellow wood | Synonyms: arere, obeche, samba, Triplochiton scleroxcylon |
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| petechia | (noun) a minute red or purple spot on the surface of the skin as the result of tiny hemorrhages of blood vessels in the skin (as in typhoid fever) | - |
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| screeching | (noun) sharp piercing cry | Synonyms: scream, screaming, screech, shriek, shrieking |
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| (noun) a high-pitched noise resembling a human cry | Synonyms: scream, screaming, screech, shriek, shrieking |
| speechifier | (noun) a person who delivers a speech or oration | Synonyms: orator, public speaker, rhetorician, speechmaker |
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| synechia | (noun) adhesions between the iris and the lens or cornea resulting from trauma or eye surgery or as a complication of glaucoma or cataract; can lead to blindness | - |
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| techie | (noun) a technician who is highly proficient and enthusiastic about some technical field (especially computing) | Synonyms: tekki |
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