MAS- 



177 



MEA- 



adult Decapoda, a bilobed mem- 

 branous lamina extending upwards 

 between the gills (zool.}. 



mastoid (mas'toid) a. [Gk. mastos, 

 breast; eidos, resemblance.] Nipple- 

 shaped ; appl. a process of the 

 temporal bone, also cells, foramen, 

 fossa, notch (anat.}. 



mastoideosquamous (mastoid'e'6- 

 skwa'mus) a. [Gk. mastos, breast ; 

 eidos, like ; L. squama, scale.] Pert. 

 mastoid and squamous parts of the 

 temporal bone (anat.}. 



mastoidohumeralis(mastoid'6humer- 

 a'lis) a. [Gk. mastos, breast ; eidos, 

 like ; L. humerus, the humerus.] 

 A muscle of certain quadrupeds 

 connecting mastoid and humerus 

 (zool.}. 



masto-occipital (mas'to-oksip'ital) a. 

 [Gk. mastos, breast ; L. occiput, the 

 occiput.] Pert, occipital bone and 

 the mastoid process of the temporal 

 (anaf.). 



mastoparietal (mas'topari'e'tal) a. 

 [Gk. mastos, breast ; L. paries, 

 wall.] Pert, the parietal bone and 

 the mastoid process of the temporal 

 (zool.}. 



mastotympanic (mas'totimpan'lk) a. 

 [Gk. mastos, breast ; tympanon, 

 drum.] Appl. part of the tympanic 

 cavity's boundary in certain Reptiles 

 (zool.}. 



matrix (ma'triks) n. [L. mater, 

 mother.] The ground substance 

 of connective tissue ; the part 

 beneath the body and root of the 

 nail ; the uterus (anaf.) ; the body 

 upon which a Lichen or Fungus 

 grows (dot.). 



mattula (mat'ula) n. [L. matta, mat.] 

 The fibrous network covering the 

 petiole bases of palms (dot.}. 



maturation (mSt'ura'shun) n. [L. 

 maturus, ripe.] The completion of 

 germ-cell development, consisting 

 of the reduction of the chromatin, 

 usually visible in the polar body 

 formation (cyt.}. 



maxilla (maksU'a) n. [L. maxilla, 

 jaw.] The jaw ; part of the upper 

 jaw beyond the premaxilla ; an 

 appendage of most Arthropods 

 posterior to the mandible, modified 

 in various ways in adaptation to 

 function and requirements (zool.). 



maxillary (maksil'ari) a. [L. maxilla, 

 jaw.] Pert, or in the region of the 

 maxilla or jaw ; appl. artery, nerve, 

 process, sinus, tuberosity, vein 

 (anaf.). 



maxillary glands, paired renal or- 

 gans opening at the base of the 

 maxilla in Crustacea (zool.}. 



maxilliferous (mak'sillf e"rus) a. [L. 

 maxilla, jaw \ferre, to carry.] Bear- 

 ing maxillae (zool.}. 



maxillifonn (maksil'Iform) a. [L. 

 maxilla, jaw ; forma, shape.] Like 

 a maxilla (zool.}. 



maxillipede (maksil'iped) n. [L. 

 maxilla, jaw ; pes, foot.] An ap- 

 pendage, in one, two, or three 

 pairs, posterior to the maxillae in 

 Arthropods (zool.}. 



maxillpdental (maksil'oden'tal) a. [L. 

 maxilla, jaw ; dens, tooth.] Pert. 

 jaws and teeth (anaf.). 



maxillojugal (maksll'ojoo'gal) a. [L. 

 maxilla, jaw ; jugum, yoke.] Pert. 

 jaw and jugal bone (anaf.). 



maxillomandibular (maksH'oman- 

 dib'ular) a. [L. maxilla, jaw ; man- 

 dibulum, jawj Appl. arch forming 

 the jaws of primitive Fishes ; pert. 

 maxilla and mandible (anaf.). 



maxillopalatal (maksH'opaTatal) a. 

 [L. maxilla, jaw ; palatus, the 

 palate.] Pert, jaw and palatal 

 bones ; appl. a maxillary process 

 of Birds (zool.}. 



maxillopharyngeal (maksirofarln'- 

 jeil) a. [L. maxilla, jaw ; Gk. 

 pharynx, gullet.] Pert, lower jaw 

 and pharynx (anaf.). 



maxillo-premaxillary (maksfl'6-pre'- 

 maksirari) a. [L. maxilla, jaw ; 

 pre, before.] Pert, the whole of 

 the upper jaw ; appl. jaw when 

 maxilla and premaxilla are fused 

 (anat.}. 



maxilloturbinal (maksH'otur'blnal) a. 

 [L. maxilla, jaw ; turbo, whorl.] 

 Pert, maxilla and the turbinals ; 

 ., a bone arising from the lateral 

 wall of the nasal cavity which 

 supports the sensory epithelium 

 (anat.}. 



maxillula (maksirula) n. [L. dim. 

 of maxilla, jaw.] A first maxilla 

 in Crustacea when there are more 

 pairs than one (zool.}. 

 meatus (mea'tus) n. [L. vteatus, a 

 M 



