| axolemma | (noun) outer membrane covering an axon | - |
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| comma | (noun) anglewing butterfly with a comma-shaped mark on the underside of each hind wing | Synonyms: comma butterfly, Polygonia comma |
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| (noun) a punctuation mark (,) used to indicate the separation of elements within the grammatical structure of a sentence | - |
| dilemma | (noun) state of uncertainty or perplexity especially as requiring a choice between equally unfavorable options | Synonyms: quandary |
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| gamma | (noun) the 3rd letter of the Greek alphabet | - |
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| (noun) a unit of magnetic field strength equal to one-hundred-thousandth of an oersted | - |
| gemma | (noun) small asexual reproductive structure in e.g. liverworts and mosses that detaches from the parent and develops into a new individual | - |
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| gramma | (noun) pasture grass of plains of South America and western North America | Synonyms: grama, grama grass, gramma grass |
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| gumma | (noun) a small rubbery granuloma that is characteristic of an advanced stage of syphilis | - |
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| lemma | (noun) a subsidiary proposition that is assumed to be true in order to prove another proposition | - |
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| (noun) the heading that indicates the subject of an annotation or a literary composition or a dictionary entry | - |
| (noun) the lower and stouter of the two glumes immediately enclosing the floret in most Gramineae | Synonyms: flowering glume |
| lumma | (noun) 100 lumma equal 1 dram in Armenia | - |
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| mamma | (noun) milk-secreting organ of female mammals | Synonyms: mammary gland |
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| (noun) informal terms for a mother | Synonyms: ma, mama, mammy, mom, momma, mommy, mum, mumma, mummy |
| momma | (noun) informal terms for a mother | Synonyms: ma, mama, mamma, mammy, mom, mommy, mum, mumma, mummy |
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| mumma | (noun) informal terms for a mother | Synonyms: ma, mama, mamma, mammy, mom, momma, mommy, mum, mummy |
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| neurilemma | (noun) thin membranous sheath around a nerve fiber | Synonyms: neurolemma |
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| neurolemma | (noun) thin membranous sheath around a nerve fiber | Synonyms: neurilemma |
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| programma | (noun) an edict that has been publicly posted | - |
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| sarcolemma | (noun) an extensible membrane enclosing the contractile substance of a muscle fiber | - |
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| stemma | (noun) an eye having a single lens | Synonyms: ocellus, simple eye |
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| (noun) the hereditary derivation of an individual | Synonyms: ancestry, blood, blood line, bloodline, descent, line, line of descent, lineage, origin, parentage, pedigree, stock |
| (noun) a tree diagram showing a reconstruction of the transmission of manuscripts of a literary work | - |