

PERCUSSOR 



1043 



PERIBLASTIC 



Percussor (per-kus'-or) [percutere, to strike through]. 

 He who or that which percusses ; a percutor. 



Percutaneous (per-ku-ta'-ne-us) [per, through ; cutis, 

 the skin] . Done through the skin ; as percutaneous 

 ligation. 



Percutor (per-ku' -tor) [Fr., percuteur ; percutere, to 

 strike]. An instrument used in the percussion of mas- 

 e and in therapeutic flagellation. 



Perditio (per-dish' -e-d) [perdere, to lose]. Abortion. 



Pereion (per-V-on) [~spi, around; levai, to go: //., 

 Pereid]. In biology, the thorax of a crustacean, as 

 distinguished from the head ( cephalon ) and abdomen 

 Bate.) 



Pereiopod \per-i' -o-pod) [irepi, around; 'itvat, to go; 

 - . foot]. In biology, an appendage of the thorax 

 of a crustacean ; an ambulatory leg. 



Pereira or Pao Pereira {per- a' -rah, pah' -o per-a'-rah) 

 [Port., "pear-tree"]. The Geissospermum lave, a 

 large apocynaceous tree of Brazil. Its bark is tonic and 

 febrifuge, retarding the heart-beat and respiration. 

 Unof. See also Pareira. 



Pereirin (per-a'-rin) [Port., pereira, "pear-tree], 

 CjjH^NjO. A somewhat poisonous alkaloid from 

 pereira-bark. Its hydrochlorate (30 gr. per diem) is 

 efficacious in fevers. Unof. 



Perelle (per-eP) [parella, the specific name for the 

 lichen]. In biology, a substance obtained from the 

 lichen, Lecanora parella, and employed in the prepara- 

 tion of a red dye. 



Perennate (per-en'-at) [perennis, lasting through the 

 year]. In biology, to live perennially. 



Perennation (per-en-a' ' -shun)[ perennis, lasting through 

 the year]. In biology, the perennial continuance of life. 



Perennial (per-en' -e-al) [per, through; annus, year]. 

 Lasting from year to year. 



Perenyi's Solution. A hxing-agent used in histologic 

 arch. Its composition is as follows : ten per cent, 

 solution of nitric acid, 4 parts ; alcohol, 3 parts ; one- 

 half per cent, solution of chromic acid, 3 parts. After 

 a short time this mixture becomes violet-colored. 



Pereterium (per-et-e'-re-um). Synonym of Trephine. 



Perfect (per'-fekt) [perfectus, finished]. Complete, 

 without blemish. In biology, having both stamens 

 and pistils ; hermaphrodite. P. Yellow. See Pig- 

 ments, Conspectus of. 



Perflation (per-fla' '-shun) [perflare, to blow through]. 



1. A method of ventilation by which a current of air 

 blowing against a dwelling is made to force its way in. 



2. Forcing air into a cavity for the purpose of evacuat- 

 ing fluid. 



Perfoliate (per-fo'-le-af) [per, through ; folium, leaf]. 

 In biology : (a) applied to a leaf that is united around 

 the stem at its base ; (6) applied to certain insect- 

 antennae consisting of a number of circular plates joined 

 by the shaft running through their centers. 



Perforans (per'-fo-ranz) [per, through ; forare, to 

 bore]. Penetrating or perforating. Applied to vari- 

 ous muscles whose tendons pass through other struc- 

 tures. P., Ulcus. Perforating ulcer. See Ulcer. 



Perforate ( per' -fo-rat) [ per, through ; forare, to bore] . 

 In biology, pierced with small holes. 



Perforated (per'-fo-ra-ted) [per, through; forare, to 

 bore]. Pierced through. P. Space. See Space. 



Perforation (per-fo-ra'-shun) [per, through; forare, 

 to bore]. The act of piercing. Also, the opening in 

 the wall of a cavity resulting from traumatism or 

 ulceration. In craniotomy, the opening of the fetal 

 head. 



Perforator (per' -fo-ra-tor) [per, through ; forare, to 

 bore]. An instrument for boring through the fetal 

 j skull ; also for perforating other bones. 

 ! Perforatus (perfora'-tus). Synonym of Perforated. 



Perfrication (per-frik-a'-shun) [per, through ; fricare, 

 to rub]. Inunction. 



Perfrigerium (per-frij-e / -re-um) [perfrigerare, to make 

 verv cold]. Numbness due to cold. 



Perfume (per'-fum, or per- f urn') [per, through"; fum- 

 are, to give off a vapor]. The odor of a volatile sub- 

 stance, especially if pleasant or agreeable. Most com- 

 mercial perfumes belong to the terpene series, and 

 have the uniform composition C 10 H 16 . In a few in- 

 stances they are manufactured synthetically, but in 

 most they are extracted from the petals of flowers. 



Perfusion (per-fu'-zhun) [per, through; fundere,Xo 

 pour] . The passage of a fluid through spaces. 



Pergameneous {per -gam - e'- ne - us) [pergameneus, 

 • parchment-like]. Resembling parchment, e. g., the 

 skin in certain cases of xeroderma. 



Pergamentaceous (per-gam-en-ta' -she-us). Same as 

 Pergameneous. 



Peri- (per'-e) [~epi, around]. A prefix signifying 

 around, or surrounding. 



Periadenitis (per-e-ad-en-i' -tis) [irepi, around ; aiip>, 

 gland; inq, inflammation]. Inflammation of the 

 tissues that surround a gland. 



Periadventitial (per-e-ad-ven-tish'-e-al) [z-epi, around ; 

 adventitius, coming from abroad]. Situated, or occur- 

 ring, around the adventitia, or external coat of a 

 vessel. 



Periah (per-i'-ah) [Heb.]. The second act in the 

 Jewish rite of circumcision. It is the act of lacera- 

 tion of the mucous membrane. 



Perialgia (per-e-al'-je-ah) [mpi, very; a/} oc, pain]. 

 Excruciating pain. 



Perianal (per-e-a'-nal) [ire pi, around ; anus, anus]. 

 Situated, or occurring, around the anus. 



Periandra (per-e-an'-drah) [rrepi, around; avrjp, a 

 male]. In biology, one of the bracts surrounding the 

 antheridia of mosses. 



Periangiocholitis (per -e- an -j'e-o-ho- It' - lis) [~epi, 

 around; icfytiaf, vessel; X° AO St bile; trie, inflamma- 

 tion]. Inflammation of the connective tissue sur- 

 rounding the biliary ducts. 



Periangioma (per- e-an-je-o'-mah) [rrepi, around; 

 ayyelov, vessel ; bua, tumor]. A tumor surrounding a 

 vessel. 



Perianth (per* -e-anth) [—epi, around ; a vdo^, flower]. 

 In biology, a collective term for the floral envelops, 

 calyx and corolla, or their representative. 



Perianthial (per-e-an'-the-al) [~epi, around; avOoc, a 

 flower]. In biology, pertaining to the perianth. Pro- 

 vided with a perianth. 



Perianthium (per-e-an' -the-um). Same as Perianth. 



Periaortitis (per-e-a-or-ti'-tis) [—epi, around ; aoprij, 

 aorta; trie, inflammation]. Inflammation of the 

 tissues surrounding the aorta. 



Periarteritis (per-e-ar-ter-t y -tis) [~epi, around ; aprT/pia, 

 artery; i~ic, inflammation]. Inflammation of the ex- 

 ternal sheath of the arteries. P. nodosa, thickening 

 of the arterial coats in localized areas, producing 

 nodular swellings. 



Periarthritis (per-e-ar-thri'-tis) [-rztpi, around ; apdpov, 

 joint ; inc, inflammation] . Inflammation of the tissues 

 about a joint. 



Periarticular (per-e-ar-tik' '-u-lar)[-epl, around ; articu- 

 lus, joint] . About or around a joint. 



Periaxial ( per-e-aks > -e-al) [Tf pi, around; dffc, axis]. 

 Situated or occurring around an axis or axis-cylinder. 



Periblast (per* -id-last) [-epi, around ; 3/.a<rroc, a 

 germ]. In biology, the protoplasm surrounding the 

 nucleus of a cell. 



Periblastic (per-ib-las'-tik) [-epi, around; 3/.aar6c, a 

 germ]. In biology, pertaining to the periblast. Ger- 

 minating from the surface of an ovum. 



