MICROSTAT 



766 



MIGRATION 



nutissimum, a species found in the groin and axilla, 

 causing an eruption. See Erythrasma. 



Micros tat (mi'-kro-stat) \jwip6g, small ; crardg, fixed]. 

 A stage and finder, for attachment to a microscope. 



Microsthenic (mi-hro-sthen'-ik) [/^/cpoc, small; abivog, 

 power]. Having feeble muscular power. 



Microstoma (mi-kro-sto' -mah) [fuxpog, small ; ardfia, 

 mouth]. Abnormal smallness of the mouth. 



Microstomatous (mi-kro-sto' -mat-us) \jwip6g, small ; 

 crofia, mouth]. Small-mouthed. 



Microstome (mi'-kro-stom) \jiiKpog, small ; ardfia, a 

 mouth]. In biology, a small mouth or orifice. 



Microstomous (mi-kros' -to-mus). Synonym of Micro- 

 stomatous. 



Microstructure (mi-kro-struk' -chiir) \jiinp6g, small ; 

 structura, a structure]. Microscopic structure. 



Microstylospore (mi-kro-sti' -lo-spor) [fwipdg, small ; 

 otvTloc, a. pillar; oiropog, a seed]. In biology, a rela- 

 tively small stylospore. 



Microstylous (mi-kro-sti' -/us) [fiiKpdg, small ; <JTV%og, 

 a pillar]. In biology, applied to short-styled flowers ; 

 having long stamens. 



Microsyphilionthus (mi-kro-sifil-e-on' -thus) [_/imp6g, 

 small ; syphilis, syphilis]. A small syphilid. 



Microtasimeter (mi-kro-tas-im' '-et-er) \jitnp6g, small ; 

 rdaig, stretching; fieTpov, measure]. An instrument 

 used in ascertaining small pressures. 



Microtesia (mi-kro-te'-ze-ah) [fwcporr/g, smallness]. 

 Congenital smallness of part of the body. 



Microtia (mi-kro'-she-ah) [/impog, small; ovg, ear]. 

 Abnormal smallness of the external ear. 



Microtome (mi'-kro-tom) \_p.LKp6g, small ; rotxf], a cut- 

 ting]. An instrument for making thin sections for 

 microscopic examination. The microtomes of Schanze, 

 Rutherford, Hamilton, Williams, Lewis, Jung, Leiter, 

 Ryder, Minot, Ranvier, and Cathcart are the most 



Ranvier's Hand Microtome. 



used. M., Freezing, one in which the tissue is 

 frozen, in order to secure the hardness required for 

 properly cutting sections. M., Hand, one consisting 

 of a hollow cylinder in which the specimen is imbed- 

 ded, and the operation of which is carried out by 

 hand. M., Immersion, one that permits of cutting 

 the sections beneath the surface of alcohol. M., 

 Rocking, for cutting sections in series. M., Sliding, 

 one in which the cutting knife operates by a sliding- 

 movement. 



Microtomist (mi-krof -o-mist) [fw<p6g, small ; to/it/, a 

 cutting]. One who cuts sections with the microtome. 



Microtomy(mi-krot' -o-me) [/w<p6r, small ; rofiin ; ri-fiveiv, 

 to cut]. In biology, the art of section-cutting, or 

 preparing tissues for histologic investigation. 



Microtrophous (mi-krof -ro-fus) [fimpog, small ; Tpcxpij, 

 nourishment]. Under-fed; containing little nourish- 

 ment. 



Micro-volt (mi'-kro-volt). See Electric Units. 



Microzooid (mi-kro-zo'-oid) [uinpog, small; £$ov, an 

 animal ; dthg, form]. In biology, applied to certain 

 small, free, swimming zooids among the Vorticellidie. 



Microzoon (mi-kro-zo'-on) [fiinpog, small ; Cfiov, an 

 animal : //. , Microzoa~\. In biology, any microscopic 

 animal ; an animalcule. 



Microzoospore (mi-kro-zo' '-o-spor) \_punpog, small ; Quov, 

 an animal ; oiropa, seed]. In biology, a relatively 

 small zoospore. 



Microzymatous (mi - kro - zi'- mat- us) [fiinpog, small ; 

 r vfirj, leaven]. Of the nature of, or caused by, a 

 microzyme ; zymotic. 



Microzyme (mi'-kro-zlm) \_funp6g, small; C"/«?> leaven]. 

 Anyone of those microorganisms, or particles of living 

 matter, which according to the theory of Bechamp, 

 are the real agents of the functions of the organism, 

 and the perversion of whose function constitutes 

 disease. They secrete a ferment, Zymase, which in 

 disease is transformed into pathogenic substances. 



Miction (mik'-shun) \_mictio, urination]. The act of 

 voiding the urine. 



Mictopyous (mik-top'-e-us) \_p.iKx6g, mixed; 7rvov,pus]. 

 Mixed with pus. 



Micturition (mik-tu-risk'-un) \_micturitio ; micturire, 

 to pass water]. The act of passing urine. 



Mid [ME. , mid, middle]. Middle. M. -brain. Syno- 

 nym of Mesencephalon. M. -facial, pertaining to the 

 middle of the face. M. -frontal, pertaining to the 

 middle of the forehead. M.-f. Process, in the em- 

 bryo, the central one of the three plates forming the 

 fronto-nasal process. M.-gut. See Mesogaster. M.- 

 head. See Ccntriciput. 



Middle (mid'-l) [ME., middel, middle]. Mean; 

 equally distant from the extremities. M. Commis- 

 sure, the medicommissure, q. v. M. Oil, the 

 second main fraction in the coal-tar distillation 

 process. It is collected between 170 C. and 

 230 C. , yielding upon further treatment two very 

 important and valuable products, namely, liquid and 

 solid carbolic acid and naphthalene. 



Midriff. See Diaphragm. 



Midwife. A female obstetrician ; a female nurse who 

 attends women in childbirth. 



Midwifery. See Obstetrics. 



Miescher's or Miescherian Sacs, Tubes or Utri- 

 cules. Sausage -shaped Psorosperm-tubes or sacc 

 found occasionally in immense numbers in the muscles 

 of pigs, cattle, sheep, mice and fowls, but never in man. 

 See under Parasites (Animal), Table of. See Utricuti. 

 M.'s Tubes. See M.'s Sacs. 



Migraine (me'-gran) [Fr.]. A paroxysmal, usually 

 unilateral headache associated with gastric, vaso-motor, I 

 and visual symptoms. There is sharp pain most 

 frequently in the temporo-frontal region of one side, 

 with general hyperesthesia of the affected surface. 

 There is photophobia; nausea and vomiting are com- 

 mon. The face may be pale or flushed. The di 

 may be hereditary, is often associated with anemia, 

 overwork, dyspepsia, eye-strain, menstrual disorders, 

 and other conditions. By some it is regarded as tin- 

 sensory analogue of epilepsy. See Hemicrania and 

 Megrim. 



Migrainous (me-gra'-nus) [Fr. , migraine']. Of At 

 nature of, or associated with, migraine. 



Migration (mi -gra'- shun) [migratio ; migrat 

 wander]. In zoology, the periodic departure ol 

 tain animals, especially birds, from one to another cli- 

 mate. M., External (of the Ovum), the passage of 



