POLYCHRESTIC 



1151 



POLYGASTRIA 



garded as efficacious in many diseases. A word em- 

 ployed in many combinations. 



Polychrestic (pol-ik-res'-tik) [to/.ic, many ; xPV^oq, 

 useful]. Of the nature of a polychrest. 



Polychroism (pol-ik-ro'-izm) \nokvq, many; ;rpotd, 

 color]. A property possessed by certain crystals, of 

 exhibiting two shades of color under polarized light, 

 which vary as the polarizing instrument is rotated. 



Polychroit (pol-ik-ro'-it). See Crocin. 



Polychromate (pol-ik-ro'-mat) [to/.ic, many ; XP" ua y 

 color]. A salt of chromic acid, containing several 

 atoms of chromium in the molecule. 



Polychromatic pol-ik-ro-mat'-ik) [to/.ic, many ; #po- 

 ua, color]. Many-colored. 



Polychrome ( pol' -ik-rom)[~o7Ac, many ; ^p«ua, color]. 

 I. A crystalline principle found in quassia and giving 

 rise in a watery solution to a variegated color. 2. 

 Esculin. 



Polychromia (pol-ik-ro'-me-ah). See PUiochromia. 



Polychromic (pol-ik-ro'-mik) [to/.ic, many ; xP^^y 

 color]. Same as Polychromatic. P. Acid, an acid 

 produced by the action of HNO., upon aloes. 



Polychromous (pol-ik-ro'-mus) [to/uc, many ; XP^H^-t 

 color]. Having many colors. 



Polychylia (pol-ik-i'-le-ah) [toAi>c, much ; x v ^Qt 

 chyle]. An excessive formation of chyle. 



Polychymia (pol-ik-i' -me-ah). Same as Polychylia. 



Poly clad ( pol'-ik-lad) [to/Uc, many; k/ASoc, a shoot 

 or branch]. In biology, applied to those platode 

 worms in which the intestine is very much branched 

 (marine Planarid). 



Polycladous (pol-ik-la' '-dus) \ko7,vc, many ; *c/„ddoc, a 

 young slip]. In biology, many-branched. 



Polyclady (pol-ik-la' -de)\jzo7.vc, many ; K7A6oq, a young 

 slip or shoot]. In biology, the production of an un- 

 usually large number of branches. 



Polyclinic (pol-ik-lin'-ik) [to/ut, many ; kaivt), a bed]. 

 A hospital in which many diseases are treated. Cf. 

 Policlinic. 



Polycoccous (pol-ik- ok'-us) [toXi>c, many; kokkoc, 

 berry]. In biology, consisting of several cocci. 



Polycopria (pol-ik-op 1 -re-ah) [to/.ic , much ; ndrrpog, 

 dung]. Excessive defecation. 



Polycoria [pol-ik-o' -re-ah) [~o7.vq, many ; n6pq, pupil]. 

 The existence of more than one pupil or opening in 

 the iris. 



Polycotyledon ( pol-ik-ot-il-e' -don) [to/.ic, many ; ko- 

 5uv, cavity]. In biology, a plant which in em- 

 bryo possesses more than two cotyledons. 



Polycotyledonary (pol-ik - ot - il - e' - don - a- re) [To/.rc, 

 many ; norv/.r/duv, cavity]. In biology, applied to 

 mammalian placentas having many tufts of fetal villi. 

 See under Placenta. 



Polycotyledonous (pol-ik -ot-il-e / - do-nus) [-olvq, 

 many ; norv7./jd'o)v, a hollow]. Of, or pertaining to, a 

 plant or a placenta having many cotyledons. See 

 Placenta. 



Polycotyledony ( pol-ik-ot-il-e' -do-ne) [to?.ic, many ; 

 Knrv/.Tjditv, cavity]. In biology, an aberrant increase 

 in the number of cotyledons. 



Polycrotic (pol-ik-rot'-ik) [to/.ic, many ; kpotoc, pulse]. 

 Applied to a pulse that appears to have more than two 

 waves for each cardiac systole. 



Polycruria (pol-ik-ru' re-ah) [~o7,vc, many ; crus, leg]. 

 Having supernumerary legs, as certain monsters. 



Polycyclic (pol-is-ik'-lik) [to/.ic, many; kvk/.oc, a 

 circle]. In biology, having many whorls. 



Polycyesia, Polycyesis (pol-is-i-e' -ze-ah, pol-is-i-e* -sis) 

 [to/it, many; KiT/aiq, pregnancy]. I. The occur- 

 rence of frequent pregnancy. 2. Multiple pregnancy. 



Polycystic (pol-is-is'-tik) [-o/.ic, many; Kvoriq, a sac]. 

 Containing many cysts. 



Polycythemia ( pol- is - i-the / - me - ah) [toa^c , many ; 

 kvtoc, cell ; a\fta, blood]. Excess of red corpuscles 

 in the blood. 

 Polydacria (pol-id-ak' -re-ah) [no/.ic, many; Saicpvov, 



tear]. Excessive lacrymation. 

 Polydactyl, Polydactyle (pol-id-ak' -til) [to/.vc, many ; 

 (Sdnrv/.oc, a finger, a toe]. In biology, an animal 

 having supernumerary fingers and toes. 



Polydactylism (pol-id-ak' -til-izm) [ttoIvc , many ; 66k- 

 rv/oc, a finger]. The existence of one or more super- 

 numerary fingers or toes. The condition is sometimes 

 hereditary. 



Polydactylous (pol-id-ak' -til-us). Same as Polydactyl. 



Polydactylus {pol-id-ak' -til-us) [-o'/.iq, many ; 66ktv- 

 aoc, finger]. A monster having supernumerary digits. 



Polydipsia (pol- id -ip/ -se - ah) [to/.vc, much ; 6iipa, 

 thirst]. Excessive thirst. It is usually present in 

 fever and in diabetes. P. ebriora, dipsomamia. 



Polyembryonate, Polyembryonic (pol-e-em'-bre-on- 

 dt, pol-e-em-bre-on' -ik) \rro7.iq, many ; if/ppvov, an 

 embryo]. In biology, pertaining to polyembryony ; 

 having several embryos. 



Polyembryony (pol-e-em' -bre-o-ne) [tto/vc, many ; 

 ipfipvov, an embryo]. In biology, the production of 

 more than one embryo in a seed. Parthenogenesis 

 occurs in most instances of polyembryony. 



Polyemia, Polyaemia (pol-e-e' -me-ah) [xoAdc, much ; 

 al,urt, blood]. Abnormal increase of the mass of the 

 blood ; plethora. After major amputations, with little 

 loss of blood, there is a transient increase, relatively 

 speaking, and this is called P. apocoptica. P. 

 aquosa, a simple increase in the amount of water 

 in the blood. P. hyperalbuminosa, an excess of 

 albumin in the blood-plasma. P. polycythaemica, an 

 increase of the red corpuscles. P. serosa, that condi- 

 tion in which the amount of blood-serum is increased. 



Polyesthesia, Polyesthesis (pol-e-es-the'-ze-ah, pol-e- 

 es-the'-sis) [to/.ic, many; aioflqoig, sensation]. An 

 abnormality of sensation in which a single touch is 

 felt as two or more. 



Polyesthetic (pol-e-es-thet' -ik) [to/.it, many ; aiafhjoiq, 

 sensation]. Pertaining to polyesthesia. 



Polygala \ pol-ig' -al- ah) [to/.ic, much; y67ja, milk]. 

 A genus of herbaceous or shrubby plants of some 260 

 species. P. senega, of X. America, is therapeutically 

 the most important. See Senega. 



Polygalactia (pol-ig-al-ak'-te-ah) \_-o7.ix, much; yala, 

 milk] . The excessive secretion of milk. See Galac- 

 torrhea. 



Polygalic Acid (pol-ig-al'-ik) [toAvc, much ; ya7.a, 

 milk], C 3 .,H 3I 1S . A glucosid extracted from Poly- 

 gala senega. It is probably the same as saponin. 



Polygalin (pol-ig' -a l-in). See Senega. 



Polygamarin (pol-ig-am' -ar-in) [to/.ic, much ; yaXa, 

 milk ; amarnni, bitter]. A crystalline bitter principle 

 obtained from Polygala amara. 



Polygamia (pol-ig-a' -me-ah) [—o7.vyauoc, polygamous]. 

 A class of plants bearing both hermaphrodite flowers 

 and those with the sexes separated. 



Polygamous (pol-ig' -am -us) [to/i>c, many; yauoq, 

 marriage]. In biology: (a) having more than one 

 mate of the opposite sex ; cf. Polyandrous, Polygyn- 

 ous ; (b) producing perfect flowers, together with 

 staminate or pistillate flowers, on the same plant or 

 species. 



Polygamy (pol-ig' -am-e) [to/vc , many ; yauoq, mar- 

 riage]. The state or practice of having more than 

 one wife or husband. 



Polyganglionic (pol-ig-gang-gle-on' -ik) \rzo7 .re, many ; 

 7-iov, ganglion]. Having several ganglia. 



Polygastria ( pol-ig-as' -tre-ah) [toXuc, much ; yaarqp, 

 stomach]. Excessive production of gastric juice. 



