| benthos | (noun) organisms (plants and animals) that live at or near the bottom of a sea, lake, river or stream | - |
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| (noun) a region including the bottom of the sea and the littoral zones | Synonyms: benthic division, benthonic zone |
| eighteenth | (noun) position 18 in a countable series of things | - |
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| eleventh | (noun) position 11 in a countable series of things | - |
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| enthalpy | (noun) (thermodynamics) a thermodynamic quantity equal to the internal energy of a system plus the product of its volume and pressure | Synonyms: H, heat content, total heat |
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| enthrallment | (noun) a feeling of great liking for something wonderful and unusual | Synonyms: captivation, enchantment, fascination |
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| enthronement | (noun) the ceremony of installing a new monarch | Synonyms: coronation, enthronisation, enthronization, investiture |
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| enthronisation | (noun) the ceremony of installing a new monarch | Synonyms: coronation, enthronement, enthronization, investiture |
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| enthronization | (noun) the ceremony of installing a new monarch | Synonyms: coronation, enthronement, enthronisation, investiture |
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| enthusiasm | (noun) overflowing with eager enjoyment or approval | Synonyms: ebullience, exuberance |
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| (noun) a lively interest | - |
| (noun) a feeling of excitement | - |
| enthusiast | (noun) an ardent and enthusiastic supporter of some person or activity | Synonyms: partisan, partizan |
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| (noun) a person having a strong liking for something | Synonyms: fancier |
| epenthesis | (noun) the insertion of a vowel or consonant into a word to make its pronunciation easier | - |
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| fifteenth | (noun) position 15 in a countable series of things | - |
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| fourteenth | (noun) position 14 in a countable series of things | - |
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| menthol | (noun) a lotion containing menthol which gives it the smell of mint | - |
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| (noun) a crystalline compound that has the cool and minty taste and odor that occurs naturally in peppermint oil; used as a flavoring and in medicine to relieve itching, pain, and nasal congestion | - |
| merobenthos | (noun) benthos consisting of organisms in pre-adult stages that later become adult in the plankton. | - |
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| microbenthos | (noun) microscopic benthic organisms that are less than 0.1 mm in size. | - |
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| nineteenth | (noun) position 19 in a countable series of things | - |
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| panentheism | (noun) the belief that God is in part of the universe and its phenomena and also transcends the universe and intervenes in its operations | - |
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| parenthesis | (noun) either of two punctuation marks (or) used to enclose textual material | - |
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| (noun) a message that departs from the main subject | Synonyms: aside, digression, divagation, excursus |
| parenthetical | (noun) an expression in parentheses | Synonyms: parenthetical expression |
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| parenthood | (noun) the state of being a parent | Synonyms: parentage |
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| penthouse | (noun) an apartment located on the top floors of a building | - |
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| seventeenth | (noun) position 17 in a countable series of things | - |
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| seventh | (noun) the musical interval between one note and another seven notes away from it | - |
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| (noun) one part in seven equal parts | Synonyms: one-seventh |
| (noun) position seven in a countable series of things | - |
| sixteenth | (noun) one part in sixteen equal parts | Synonyms: one-sixteenth, sixteenth part |
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| (noun) position 16 in a countable series of things | - |
| tenth | (noun) a tenth part; one part in ten equal parts | Synonyms: one-tenth, ten percent, tenth part |
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| (noun) position ten in a countable series of things | - |
| thirteenth | (noun) position 13 in a countable series of things | - |
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| venthole | (noun) a hole for the escape of gas or air | Synonyms: blowhole, vent-hole, vent |
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