II 



M. The abbreviation of Musculus, of Meter, of Myo- 

 of Minim, of Molar, and of Misce, mix ; it is also 

 used to represent the number iooo. 

 mm. An abbreviation for millimeter, 

 mmm. An abbreviation for Micro-millimeter. 



The abbreviation universally adopted for 

 micron or micro-millimeter. 

 Ma. An abbreviation of Milliampere. 

 Maas's Mixture. A mixture employed in the treatment 

 eczematous diseases of the ear. It is constituted as 

 Hows: corrosive sublimate 5 parts, sodium chlorid 

 parts, glycerin 200 parts. 



'bah) [native Tonga- Tabu]. A genus of 

 naceous trees and shrubs of many species. M. 

 nus, of the Moluccas, is regarded as a good anti- 

 hilitic and antirheumatic. Unof. 



An abbreviation of Macera , macerate, 

 ic, Mc, M'., beginning proper names will be found 

 if spelled Mac, and in strict alphabetic order, 

 caco Worm (mak-a'-ko wurm) [from a Malagasy 

 name]. The larva of a S. American fly, Dermatobia 

 noxialis, which infests the skin of men and animals. 

 See Parasites (Animal), Table of. 

 Macallo 1 mak-al'-o). See Andira. 

 Macaroni (mak-ar-o / -ne) [Ital.]. I. Slender tubes 

 made of flour-paste ; a favorite dish in Italy and also in 

 the U. S. 2. An active purgative used in lead-colic. 

 Antimony sulphid is one of the ingredients. 

 McBurney's Point. A localized point of tenderness 

 on deep pressure, supposed to be diagnostic of appen- 

 dicitis. It is about two inches above the anterior 

 superior spine of the ilium on a line drawn from this 

 point to the umbilicus. 

 Macdowel's Frenum. See Frenum. 

 McDowell's Operation. See Operations, Table of. 

 Mace (mas). See Myristica. 



Macene •nds-in') [maris, mace], Cj H 16 . An essential 



oil resulting from the distillation of the flowers of 



nutmeg. The hydrochlorate on distillation yields a 



camphor. 



Maceration (mas-er-a'-shun) [maceratio ; macerare, to 



make soft]. Extraction of the medicinal qualities of a 



substance by steeping or infusing. Applied, also, to 



a softening and non-putrefactive decomposition of the 



dead fetus long carried in the uterus. 



Macewen's Method. A method of preparing animal 



ligatures. To I oz. each of water and glycerin add 



12 grs. of chromic acid crystals ; in this steep the 



ligatures ten days, then remove and thoroughly dry ; 



for preservation keep in a 5 per cent, carbolic-acid 



solution. M.'s Operation. See Operations , Table 0/ '. 



Machopolyp (mak'-o-pol-ip) \11axn, fight ; Kokvirnvq, 



a polyp]. In biology, a modified polyp abundant in 



the Plumidaridce, having a defensive function ; some 



animals possess urticating capsules, others, instead, 



adhesive granules. The name was introduced by 



Hamann ; it is also called Guard-polyp. 



Macies ma'-se-lz) [maries, a wasting]. Atrophy, 



leanness, wasting. M. infantum. Synonym of 



Tabes mesenterica. 



Macilent (mas'il-ent) [macilentus, lean]. Meager; 



thin ; lean. 

 Macintosh's Cream. A dressing for urticaria. It con- 

 sists of subnitrate of bismuth 2 drams, oxid of zinc 

 :ram, glycerin l}£ drams, liquid carbolic acid 

 from 20 to 30 minims, vaselin 6 ounces. 

 M'Kinnell's Ventilator. See Ventilation. 

 Mackintosh {mak' -in-tosh) [after Charles Mackintosh, 



715 



MACROCEPHALIA 



M 



the inventor]. A fabric of silk or cotton, rendered 

 waterproof and airproof by a coating of india rubber-, 

 it is used in antiseptic surgery and in obstetrics. 



McLeod's Capsular Rheumatism. A form of 

 rheumatoid arthritis attended with effusion into the 

 synovial capsules and into the synovial sheaths and 

 bursae about the affected joints. See Diseases, Table of. 



Maclurin (mak-lu'-rin) [after \V. Maclure~\, C^H^Og. 

 A principle found in yellow- wood (Morus tinctoria), 

 from which it may be extracted by hot water. It 

 occurs in the form of a yellow, crystalline powder, sol- 

 uble in water and alcohol ; it is found also in Madura 

 aurantia, or Osage-orange. 



McMunn's Elixir. See Opium. 



Macquer's Arsenical Salt. The arseniate of potassium. 



Macradenous (mak-rad'-en-us) [uaxpog, large ; adrfv, 

 gland]. Having large glands. 



Macraesthete (mak' '-res-thet) \jianp6q, large; aioOifrog, 

 perceived by the senses]. In biology, Moseley's term 

 for one of the more or less fusiform sense-bodies that 

 occupy the cavities of the megalopores of the Chiton- 

 ida. They terminate in conspicuous obconical plugs of 

 transparent, highly refractive tissue, and are com- 

 posed of a number of cylindric strands of tissue held 

 closely together. Cf. Aesthete. 



Macrandrous \mak-ran' -drus) \jumpoc, long; avi/p, 

 male]. In biology, applied to such plants (alga) as 

 have the male plants large or elongated. 



Macrantrus (mak-ran' -trus) [jiaxpog, large ; avrpov, 

 a cave]. Lissauer's term for a skull in which the 

 vertical line extending from the most prominent point 

 of the frontal torus to the radius fixus is from four 

 to nine mm. in front of that from the nasion to the 

 radius fixus. 



Macrauchen (mak-ra-u/ -ken) [aa/cpoc, large ; a.\rxyp>, 

 neck]. A long-necked person. 



Macrencephalic (mak-ren-sef-aF-ik). Macrencephal- 

 ous (mak-ren-sef'-al-us) [uaxpbg, long; cjK£pa?.oc, 

 brain]. Having a large or long skull. 



Macrencephalus (mak-ren-srf'-al-us) [/uucpog, large ; 

 kyKEoa/joq, brain]. Lissauer's term for a skull in 

 which the angle formed by the junction of the lines 

 drawn from the hormion to the nasion and to the 

 inion is between 156. 5 and 170 . 



Macrencranus (tnak-reti-kra'-mis) \jiaKpog, large ; ev, 

 in; Kpaviov, skull]. Lissauer's term for a skull hav- 

 ing a large cerebellar sector (from 20 to 27. 5 ). 



Macritas (mak'-rit-as) [macer, lean]. Emaciation; 

 leanness. 



Macro- (mak' ro-) [jtaxpoc, long, great]. A prefix 

 signifying great, long, or extensive. 



Macrobiosis (mak-ro-bi-o / -sis)\jianp6q, long; /?/of,life]. 

 A condition characterized by long life ; longevitv. 



Macrobiote (mak-ro / -be-ot) [uaKpoftiorog, having a long 

 life]. One who lives long. 



Macrobiotic (mak-ro-bi-ot / -ik) [uaxpbg, long; {Hog, 

 life]. Pertaining to long life ; long-lived. 



Macrobiotics (mak-ro-bi-ot' -iks) [uaupbg, long ; /fc'of, 

 life]. A proposed system of living in a manner con- 

 ducive to length of life ; the art or study of longevity. 



Macrobius (mak-ro / -be-us). See Macrobiotic. 



Macrocarpin {mak-ro-karf-pin) [juaKpog, large ; Kapiroc, 

 fruit]. A crystalline neutral principle extracted from 

 the root of Thalictrum macrocarpum. 



M acrocarpous (mak-ro-kar* '-pus) [fiaxpoc, long ; 

 icapxoc, fruit]. In biology, bearing large fruit. 



Macrocephalia (mak-ro-sef-a' le-ah) [fiaxpoq, large; 

 KEoas.T], head]. Excessive development of the head 



