| bioelectricity | (noun) electric phenomena in animals or plants | - |
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| blastocoele | (noun) the fluid-filled cavity inside a blastula | Synonyms: blastocele, blastocoel, cleavage cavity, segmentation cavity |
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| coelenterate | (noun) radially symmetrical animals having saclike bodies with only one opening and tentacles with stinging structures; they occur in polyp and medusa forms | Synonyms: cnidarian |
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| coelenteron | (noun) the saclike body cavity of a coelenterate | - |
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| haematocoele | (noun) swelling caused by blood collecting in a body cavity (especially a swelling of the membrane covering the testis) | Synonyms: haematocele, hematocele, hematocoele |
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| hematocoele | (noun) swelling caused by blood collecting in a body cavity (especially a swelling of the membrane covering the testis) | Synonyms: haematocele, haematocoele, hematocele |
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| hydroelectricity | (noun) electricity produced by water power | - |
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| immunoelectrophoresis | (noun) electrophoresis to separate antigens and antibodies | - |
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| macroelement | (noun) a chemical element required in relatively large quantities for the normal physiologic processes of the body. | Synonyms: major mineral |
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| microelectronics | (noun) the branch of electronics that deals with miniature components | - |
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| oscheocoele | (noun) swelling of the scrotum | Synonyms: oscheocele |
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| photoelectricity | (noun) electricity generated by light or affected by light | - |
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| photoelectron | (noun) an electron that is emitted from an atom or molecule by an incident photon | - |
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| piezoelectricity | (noun) electricity produced by mechanical pressure on certain crystals (notably quartz or Rochelle salt); alternatively, electrostatic stress produces a change in the linear dimensions of the crystal | Synonyms: piezo effect, piezoelectric effect |
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| pyroelectricity | (noun) generation of an electric charge on certain crystals (such as tourmaline) as a result of a change in temperature | - |
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| thermoelectricity | (noun) electricity produced by heat (as in a thermocouple) | - |
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