| protogonoplasm | A differentiated mass of cytoplasm in a protozoan, which forms the substance of later developing reproductive bodies. Origin: proto-+ G. Gonos, seed, + plasma, a thing formed (05 Mar 2000) |
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| protogynous | Having the female sex organs maturing before the male, of a flower, shedding the pollen after the stigma has ceased to be receptive. Compare: protandrous. (09 Oct 1997) |
| protogyny | In plants, the development of the female organs before the appearance of the corresponding male products - thus inhibiting self-fertilization. (09 Oct 1997) |
| protohippus | <paleontology> A genus of fossil horses from the Lower Pliocene. They had three toes on each foot, the lateral ones being small. Origin: NL, from Gr. First + horse. Source: Websters Dictionary (01 Mar 1998) |
| protokylol hydrochloride | Alpha-[(alpha-Methyl-3,4-methylenedioxyphenethylamino)methyl]protocatechuyl alcohol hydrochloride;a derivative of isoproterenol with the selective beta-receptor-stimulating activity of the parent compound; it is effective orally and is more stable in the body than isoproterenol; used as a bronchodilator in the treatment of bronchial asthma and status asthmaticus. (05 Mar 2000) |
| protoleukocyte | A primitive leukocyte; a leukocyte of the bone marrow. (05 Mar 2000) |
| protolignin | <plant biology> An immature form of lignin that can be extracted from the plant cell wall with ethanol or dioxane. (18 Nov 1997) |
| protolysate | Rarely used term for a protein hydrolysate. (05 Mar 2000) |
| protolysosome | <cell biology> Primary lysosome that has not been involved in fusion with another vesicle or in digestive activity. Origin: Gr. Soma = body (18 Nov 1997) |
| protomartyr | The first martyr; the first who suffers, or is sacrificed, in any cause; applied especially. To Stephen, the first Christian martyr. Origin: LL, fr. Gr.; first + martyr: cf. F. Protomartyr. See Proto-, and Martyr. Source: Websters Dictionary (01 Mar 1998) |
| protomer | <cell biology> Subunits from which a larger structure is built. Thus the tubulin heterodimer is the protomer for microtubule assembly, G actin the protomer for F actin. Because it avoids the difficulty that arises with, for example: dimers that serve as sub units for assembly, it is a useful term that deserves wider currency. (18 Nov 1997) |
| protomerite | <zoology> The second segment of one of the Gregarinae. Origin: Proto- + -mere + -ite. Source: Websters Dictionary (01 Mar 1998) |
| protometrocyte | The ancestor cell of the protoleukocyte and protoerythrocyte, or of the cells of the leukocytic and erythrocytic series. Origin: proto-+ G. Meter, mother, + kytos, cell (05 Mar 2000) |
| protomorphic | <biology> Having the most primitive character; in the earliest form; as, a protomorphic layer of tissue. Origin: Proto- + Gr. Form. Source: Websters Dictionary (01 Mar 1998) |
| proton | <physics> An elementary atomic particle with a positive charge and a mass of about 1 amu. (09 Oct 1997) |
Synonyms : Russell Viper Venom Time, Russells Viper Venom Time, Prothrombin Times, Test, Quick, Time, Prothrombin, Times, Prothrombin
Synonyms : Ets-1 Transcription Factor, Proto-Oncogene Proteins c-ets-1, c-ets1 Transcription Factor, Ets 1 Transcription Factor, Proto Oncogene Protein c ets 1, Proto Oncogene Protein ets 1, Proto Oncogene Proteins c ets 1, Transcription Factor, Ets-1, c ets 1 Protein
Synonyms : Proto-Oncogene Proteins c-ets-2, Proto-Oncogene Proteins ets-2, Proto Oncogene Protein c ets 2, Proto Oncogene Proteins c ets 2, Proto Oncogene Proteins ets 2, c ets 2 Protein, c-ets-2, Proto-Oncogene Protein, c-ets-2, Proto-Oncogene Proteins
Synonyms : Friend Leukemia Integration 1 Transcription Factor, Proto-Oncogene Proteins c-fli-1, Retroviral Integration Site Protein Fli-1, Proto Oncogene Protein c fli 1, Proto Oncogene Proteins c fli 1, Retroviral Integration Site Protein Fli 1
Synonyms : Proto Oncogene Proteins, Cellular, Proto-Oncogene Products, Cellular, Cellular Proto Oncogene Proteins, Cellular Proto-Oncogene Products, Proto Oncogene Products, Cellular, Proto Oncogene Proteins, Proto-Oncogene Proteins, Cellular, c onc Proteins
| protostome |
(pro
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| Protostomia |
(Pro
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| Protostrongylidae |
(Pro
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| Protostrongylus |
(Pro
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| protosulfate |
(pro
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