MALLEIN 



722 



MALPRESENTATION 



Mallein (mat' '-e-iri) [malleus, farcy]. A fluid obtained 

 from potato-cultures of the Bacillus mallei, the mi- 

 croorganism of glanders. When injected into the cir- 

 culation of a glandered animal, it causes an elevation 

 of temperature, and on account of this property it has 

 been recommended for use in the early diagnosis of 

 farcy or glanders. 



Mallenders (inal' -en-derz) [malandria, blisters on the 

 neck]. A kind of eczema or scab above the fore-foot, 

 and about the knee of the horse. 



Malleo-incudal (mal' '-e-o-ing 1 '-ku-dal) \_malleus, ham- 

 mer ; incus, anvil]. Relating to the malleus and the 

 incus. 



Malleolar (inal-e'-o-lar) [malleolus, little hammer]. 

 Relating to a malleolus. 



Malleolus (jnal-e'-o-lus) [dim. of w«//i?ai, hammer : //. , 

 Malleoli]. A part of a process or bone having a ham- 

 mer-head shape. In biology, a layer or bent-down 

 shoot which emits roots at the notched bend. M., 

 External, a name by which the lower extremity of 

 the fibula is known. M., Internal, the pyramidal 

 process of the internal surface of the lower extremity 

 of the tibia. 



Mallet [mal'-et) [OF., mallet, a hammer]. A small 

 wooden hammer. M., Automatic, an instrument 

 operated by the action of a steel spiral spring, and used 

 for condensing gold in filling teeth. M., Electro- 

 magnetic, a dental mallet operated by electricity. 

 M. -finger. See Finger. M., Hyde's Pneumatic, 

 a dental mallet with an air-pump attached, which is 

 operated by the foot, revolving 

 a fly-wheel and a drive-wheel. 

 M.-toe, a deformity of a toe 

 characterized by deficient exten- 

 sion or undue flexion of the ter- 

 minal phalanx. 



Malleus (mal / -e-us)[malleus, ham- 

 mer: //. , Mallei]. I. A bone 

 or ossicle of the internal ear 

 having the shape of a hammer. 

 It is articulated with the incus, Auditory Ossicles 

 and the tensor tympani muscle i. Head of maUeus 

 arises from it. 2. Synonym of 

 Equinia. 3. In biology: (a) One 

 of the Weberian ossicles that form 

 a chain between the air-bladder 

 and the auditory apparatus in 

 certain fishes ; (b) One of the paired calcareous pha- 

 ryngeal structures of a rotifer. M. humidus. 

 Synonym of Glanders. 



Mallory's Phospho-molybdic Acid Hematoxylin. 

 See Stains, Table of. 



Mallow (inal'-o). See Malva. 



Malnutrition {inal-nti-trish f -un) [mains, bad ; tiutrire, 

 to nourish]. Imperfect nutrition or sustenance,. due 

 to imperfect assimilation of the food. 



Malo-maxillary (tna> '-lo-maks* '-il-a-re) [mala, cheek ; 

 maxilla, maxilla]. Relating to the cheek or malar 

 bone and the maxilla. 



Malonic Acid (mal-on' '-ik). Sep. Acid. 



Malpighi, Acini of. The Malpighian bodies. M., 

 Bodies of. See Malpighian Bodies. M., Canals 

 of, renal organs or tubes in certain arthropods. M., 

 Capsule of, the membranous envelop of a renal 

 glomerulus. M., Corpuscles of. See Malpighian Cor- 

 puscles. M., Follicles of. See Malpighian Bodies. 

 M., Glomerules of, the Malpighian Bodies, q. v. 

 M., Pyramids of See Pyramid. M., Tubes or 

 Tubules of. See M. , Canals of. M., Tuft of. See 

 Malpighian. M., White Canals of. See Canal. 

 M., Yellow Canals of. See Canal. 



Malpighian Bodies {mal-pig'-e-an) [from Malpighi, an 



Italian anatomist] . The commencement of the unnif- 

 erous tubules, consisting of the glomerulus of vessel? 

 (the Malpighian tuft) and the membranous envelop 



Processus brevis. 3. 

 Processus gracilis. 

 4. Manubrium. 5. 

 Long process of in- 

 cus and stapes. 7. 

 Stapes. 



n> Cortex. 



Boundary, or 

 marginal zone. 



Jc\ Papillary' zone. 



Longitudinal Section of a Malpighian Pyramid 

 PF. Pyramids of Ferrein. RA. Branch of renal artery. RV. 

 Lumen of renal vein receiving interlobular vein. VR. Vasa 

 recta. PA. Apex of a renal papilla, b, b. The ba 

 the renal lobules. 



(the Malpighian capsule) . M. Corpuscles, a name 

 given to certain whitish, minute granules in the red 

 substance of the spleen along 

 the course of the blood-ves- 

 sels. They are composed of 

 lymphadenoid tissue. M. 

 Follicles, the M. bodies. M. 

 Layer, the rete mucosum of 

 the skin. M. Tuft. See 

 Malpighian Bodies. M. Ves- 

 sels, tubular, cecal diverticula 

 of the hind-gut of Arthropods, 

 especially characteristic of the 

 Antennata ; they arise as in- 

 vaginations from the ecto- 

 dermal proctodeum, and vary 

 in number and in function as 

 excretory organs. 



Malposition {malfo-zish' -un) 



[malus, bad ; posttio from a Rena , ar(i 

 ponere, to place]. 1 he 1m- vein. d. Tube 

 proper or abnormal position rein. c. C;u>sul< 

 of any part or organ, espe- g^g* ° 

 daily of the fetus. 



Malpractice [mal-prak'-tis) [mains, bad ; -pa: 

 tion]. A term applied to the treatment of a d 

 that is contrary to that taught by experience, 

 improper setting of a fracture or reduction ol a 

 cation ; also, the unlawful production of an abortion 



Malpresentation [mal-pre-sen-ta'-shun) [malus, 

 pnesentare, to phue before]. A position of thi 

 at birth in such form that its delivery is difficult or i"' 

 possible. 



