| menaquinone-7 | Menaquinone-6 with a 3-heptaprenyl side chain. Synonym: vitamin K2(35). (05 Mar 2000) |
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| menarche | <gynaecology> The establishment or beginning of the menstrual function. Origin: Gr. Men = month, arch = beginning (18 Nov 1997) |
| menarchial | Pertaining to the menarche. (05 Mar 2000) |
| mend | 1. To repair, as anything that is torn, broken, defaced, decayed, or the like; to restore from partial decay, injury, or defacement; to patch up; to put in shape or order again; to re-create; as, to mend a garment or a machine. 2. To alter for the better; to set right; to reform; hence, to quicken; as, to mend one's manners or pace. "The best service they could do the state was to mend the lives of the persons who composed it." (Sir W. Temple) 3. To help, to advance, to further; to add to. "Though in some lands the grass is but short, yet it mends garden herbs and fruit." (Mortimer) "You mend the jewel by the wearing it." (Shak) Synonym: To improve, help, better, emend, amend, correct, rectify, reform. Origin: Abbrev. Fr. Amend. See Amend. Source: Websters Dictionary (01 Mar 1998) |
| Mendel's first law | Factors that affect development retain their individuality from generation to generation, do not become contaminated when mixed in a hybrid, and become sorted out from one another when the next generation of gametes is formed. Synonym: Mendel's first law. (05 Mar 2000) |
| Mendel's instep reflex | The foot being firmly supported on its inner side, a sharp tap on the dorsal tendons causes extension of the second to the fifth toes. Synonym: back of foot reflex, dorsum of foot reflex. (05 Mar 2000) |
| Mendel's laws | <genetics> The two basic principles of genetics proposed by Gregor Mendel. The law of segregation, which states that the alleles governing a trait are separated during the creation of gametes (meiosis). The law of independent assortment, which states that the genes controlling different traits are distributed separately from each other during meiosis. (13 Nov 1997) |
| Mendel's second law | Different hereditary factors assort independently when the gametes are formed; traits at linked loci are an exception. Synonym: Mendel's second law. (05 Mar 2000) |
| Mendel, Gregor | <person> Austrian geneticist, 1822-1884. See: mendelian character, mendelian inheritance, mendelian ratio, Mendel's first law, Mendel's second law. (05 Mar 2000) |
| Mendel, Gregor Johann | <person> An Austrian monk and botanist. His breeding experiments on garden peas and subsequent formulation of the laws of heredity formed the basis for the field of genetics. Lived: 1822-1884. (13 Nov 1997) |
| Mendel, Kurt | <person> German neurologist, 1874-1946. See: Mendel's instep reflex, Bechterew-Mendel reflex. (05 Mar 2000) |
| Mendel-Bechterew reflex | Percussion of the dorsum of the foot causes flexion of the toes; present in a pyramidal lesion. Synonym: dorsum pedis reflex, Mendel-Bechterew reflex. (05 Mar 2000) |
| Mendeleeff's law | The properties of elements are periodical functions of their atomic weights; i.e., if the elements are arranged in the order of their atomic weights, every element in the series will be related in respect to its properties to the eighth in order before or after it. Synonym: periodic law. (05 Mar 2000) |
| Mendeleeff, Dimitri | <person> Russian chemist, 1834-1907. See: mendelevium, Mendeleeff's law. (05 Mar 2000) |
| mendelevium | <chemical> Mendelevium. A man-made radioactive element of the actinide family with atomic symbol md, atomic number 101, and atomic weight 258. Chemical name: Mendelevium (12 Dec 1998) |