PERIBLASTULA 



1044 



PERICARPOIDAL 



Periblastula [per-ib-las' '-tu-lah) [irepl, around ; /3/iacr- 

 t6c, germ]. A segmenting ovum in which the outer 

 layer of cells is more highly developed than the inner. 



Periblem {per' '-ib-lem) [irepi/3'A/jfia, a covering]. In 

 biology, a zone of meristem lying between the 

 plerome and the dermatogen at the growing end of an 

 axial organ. 



Periblepsia, Periblepsis [per-ib-lep'-se-ah, per-ib-lep'- 

 sis) [irepi, around ; fi/JTreiv, to look]. The wild, un- 

 natural look observed in delirium. 



Peribole [per-ib'-o-le) [-Kepi, around ; PaXlsiv, to throw]. 

 The elimination of morbi,fic substances through dis- 

 eased conditions of the skin. 



Peribranchial [per-ib-rang' -ke-al) [ire pi, around; 

 jipdyxia, gills]. In biology, arranged about the 

 branchiae. 



Peribronchial [per-ib-rong' '-ke-al) [ivepi, around ; j3poy- 

 Xoq, bronchus]. Pertaining to the tissue about the 

 bronchus ; surrounding a bronchus. P. Lymphan- 

 gitis, inflammation of the peribronchial lymphatic 

 vessels. 



Peribronchitis [per-ib-rong- ki'-tis) [irepi, around; 

 [ipoyxoc, bronchus ; mc, inflammation]. Inflamma- 

 tion of the pulmonary tissue immediately surrounding 

 the bronchi. P., Caseous, a peribronchitis due to 

 tuberculosis, and usually accompanying caseous bron- 

 cho-pneumonia. P., Purulent, a peribronchial inflam- 

 mation with the formation of pus. P., Tuberculous, 

 peribronchitis due to the tubercle-bacillus. 



Peribrosis [per-ib-ro' 'sis) [irepi, around ; fipuctc, a 

 feeding]. Ulceration at the canthi of the eyelids. 



Pericaecal {per-is-e'-kal). See Pericecal. 



Pericaementitis [per-is-em-en-ti' -tis). See Pericementi- 

 tis. 



Perical [per'-ik-al). See Fungus-foot. 



Pericambium [per-ik-am' '-be-um). See Phloem-sheath. 



Pericardiac, Pericardial [per-ik-ar' '-de-ak, per-ik-ar'- 

 de-al) [Kepi, around ; Kapdia, heart]. Pertaining to 

 the pericardium. 



Pericardiacophrenic [per-ik-ar-de-ak-p-fre' '-nik) [~epi, 

 around ; Kapdia, heart ; (ppi/v, diaphragm] . Pertaining 

 to the pericardium and the diaphragm. 



Pericardial [per-ik-ar' -de-al) [irepi, around; Kapdia, 

 heart]. Pertaining to the pericardium. Surrounding 

 the heart. P. Cavity, the space between the peri- 

 cardium and the heart. P. Pleura, that part of the 

 pleura attached to the pericardium. P. Space. 

 Same as P. Cavity. 



Pericardian [per-ik-ar' -de-an). Same as Pericardial. 



PericaTdiopneumatosis(per-ik-ar'-de-o-nu-mat-o'-sis). 

 Synonym of Pneumopericardium. 



Pericardiotomy [per-ik-ar-de-of -o-me) [irepl, around ; 

 Kapdia, heart; roprj, a cutting]. Incision of the 

 pericardium. 



Pericarditic [per-ik-ar-dit'-ik) [irepl, around ; Kapdia, 

 heart ; iTic, inflammation]. Pertaining to pericarditis. 



Pericarditis [per-ik-ar-di' -lis) [irepl, around ; Kapdia, 

 heart; trie, inflammation]. Inflammation of the peri- 

 cardium. It may be complicated with myocarditis or 

 endocarditis. It is rarely a primary affection, but is 

 usually secondary to such diseases as rheumatism, 

 chronic nephritis, scarlet fever, measles, pyemia, 

 scorbutus, and hemorrhagic purpura. Many cases 

 are due to extension of inflammation from neighboring 

 organs, as from pleurisy and pleurisy with pneumonia ; 

 sometimes, also, to extension of endocardial inflamma- 

 tion. Tuberculosis may affect the pericardium by ex- 

 tension from the lung, but occasionally it appears as a 

 primary disease of the serous membrane. In addition, a 

 pericarditis may follow malignant disease of the peri- 

 cardium. Actinomycosis may spread to the pericar- 

 dium from the lung or the mediastinum. Syphilis of 



the pericardium is usually secondary to myocardial 

 syphilis. It leads to pericardial adhesions. P., Ad- 

 hesive, pericarditis in which the two layers of pericar- 

 dium tend to adhere. P., Carcinomatous, pericarditis 

 due to carcinoma of the pericardium. In rare cases 

 pericarditis may accompany carcinoma of a remote 

 organ. P., Dry, pericarditis without effusion. P., 

 External, inflammation of the outer layer of the peri- 

 cardium ; it is usually accompanied by inflammation of 

 the contiguous pleura. P., Fibrinous, a form in which 

 the membrane is covered with a fibrinous exudate, first 

 soft and buttery in consistence, but later organizing. 

 Tuberculous pericarditis is likely to lead to large tie- 

 posits of fibrin. P., Hemorrhagic, a form in which 

 the fluid is hemorrhagic. This is the case most often 

 in tuberculous pericarditis ; also in scorbutus and in 

 cachectic conditions. P., Internal, inflammation of 

 the serous surface of the pericardium. P., Localized, 

 whitish areas, the so called milk-spots (a. v.), due to 

 circumscribed pericarditis. P., Obliterating, a form 

 leading to adhesion of the two layers of pericardium 

 and obliteration of the cavity. See Pericardium, 

 Adherent. P., Purulent, pericarditis in which the 

 effused fluid becomes purulent. This is not very rare 

 in children. P., Rheumatic, that due to rheumatism. 

 P., Sero-fibrinous, a form in which there is but 

 little lymph or fibrin, but a considerable quantity 

 of serous fluid. P., Tuberculous, pericarditis due 

 to tuberculous infection of the pericardium ; it is usu- 

 ally secondary, from extension from neighboring organs, 

 but is sometimes primary. The membrane is covered 

 with thick layers of fibrin, beneath which are miliary 

 tubercles ; there may also be larger cheesy masses. 

 The quantity of fluid is usually small, but may be 

 large, and the effusion is generally hemorrhagic. 



Pericardium [per-ik-ar 1 '-de-um) [nepi, around; />< 

 heart]. The closed membranous sac or covering that 

 envelops the heart. Its base is attached to the central 

 tendon of the diaphragm ; its apex surrounds for a 

 short distance the great vessels arising from the base 

 of the heart. It consists of an ectal fibrous coat, 

 derived from the cervical fascia, and an ental scions 

 coat. The sac normally contains from half a dram 

 to a dram of clear serous fluid. P., Adherent, a 

 condition resulting from a previous pericarditis, in 

 which the two layers of the pericardium are bound 

 together by newly-formed connective tissue. P., 

 Bread-and-butter, a peculiar appearance produced 

 in fibrinous pericarditis by the rubbing of the two 

 surfaces of the membrane over each other. The 

 surface is rough, like that produced when two pi 

 of butter-and-bread, that have lain with their spread 

 sides in contact, are pulled apart. P., Calcified, 

 calcification of the pericardium, occurring in spots or 

 diffusely. P., Parietal, the reflection of the peri- 

 cardium not in direct contact with the heart ; tht 

 tion in contact with the pleura and the diaphragm. 

 P., Visceral. P., Shaggy, a pericardium upon which, 

 as the result of fibrinous pericarditis, thick, ! 

 shaggy layers of fibrin are deposited. P., Visceral, 

 the epicardium, i. e., the layer of pericardium at- 

 tached to the surface of the heart. 



Pericarp [per'-ik-arp) [irepl, around ; Kapirdc, fruit]. 

 In biology : (a) the shell or cover of a fruit ; (6 

 wall of a ripened ovary. 



Pericarpial [per-ik-ar' -pe-al). Same as Pericarpic. 



Pericarpic [per-ik-ar' -pik) [irepl, around ; m 

 fruit]. Pertaining to the pericarp. 



Pericarpium [per-ik-ar' -pe-um). Same as Pericarp. 



Pericarpoidal ( per - ik - ar-poid'- al) [irepl, around ; 

 Kapir6c, fruit; eldpc, like]. In biology, resembling a 

 pericarp. 



