PROAMNION 



1161 



PROCESS 



Proamnion ( pro-am' -tie-on) [rvpo, before; auviov, am- 

 nion]. In biology, a term introduced by Ed. van 

 den to designate that part of the area embryanalis 

 at the sides and in front of the head of the developing 

 embrvo, which remains without mesoderm for a con- 

 siderable period. [Minot.] 



Proamniotic {pro-am-ne-of '-ik) [xpo, before ; hfiviov, 

 amnion]. Pertaining to the proamnion. 



Proangiosperm {pro - an'- je - o - sperm) [xp6, before; 

 \av, vessel ; arrepua, seed]. In biology, a primi- 

 tive or ancestral angiosperm. 



Proangiospermic {pro-an-je-o-sper' -mik) [~po, before ; 

 e=sel ; o-epua, seed]. Pertaining to a pro- 

 angiosperm. 



Proatlas \ pro-at' -las) [pro, before; atlas, the first cer- 

 vical vertebra]. A primitive or rudimentary atlas. 



Probable Duration of Life. The time, considering 

 all circumstances, that a person of a given age may 

 expect to live, as determined by statistics. The age 

 at which any number of children born into the world 

 will be reduced to one half, so that there are equal 

 chances of their dying before and after that age. The 

 age at which a given population is reduced by one- 

 half its number. 



Probang ( pro' -bang) [probare, to try] . A rod of 

 whalebone or other material for the making of 

 local applications to the esophagus or pharynx. P., 

 Ball, a probang having an ivory bulb attached to one 

 end. P., Sponge, one provided with a small sponge 

 at one end. 



Probarbium {pro - bar*- be -urn) [pro, before ; barba, 

 beard]. The soft, downy hair which precedes the 

 j growth of a beard. 



Probasis (pro-ba'-sis) [Tzpo(icuveiv, to step forward], 

 i Change of place ; prolapse. 



Probe (prob) [probare, to prove]. A slender rod 

 or wire, flexible, rigid, or jointed, for exploring a 

 wound or sinus. As a verb, to explore with a probe. 

 P., Anel's, a delicate silver or gold probe for explor- 

 ing or dilating the lacrymal puncta and lacrymal 

 canals. P., Blunt, one with a blunt extremity. 

 Ps., Bowman's, flexible graduated probes used for 

 dilating the nasal duct. P., Chemic, one carrying 

 charpie with dilute acetic acid or other drug. P., 

 Drainage, one so constructed and used as to assist 

 drainage. P., Drum, one provided with a drum or 

 reverberator to enable the ear to detect contact with for- 

 eign bodies. P., Ear, one used in exploring the ear. 

 P., Electric, one having two insulated wires, so that 

 contact with a bullet or metal completes the circuit, and 

 thus indicates the presence of such a foreign body. P., 

 Eyed, a probe having a slit at one end through which 

 a tape or ligature can be passed. P. , Flexible, one 

 that can be bent into any desired shape. P., Jointed, 

 a probe used in exploring for carious bone through 

 sinuses. P., Lacrymal, one used for dilating the 

 lacrymal passages. P., Magnetic, the employment 

 of the telephone as an indicator. P., Meerschaum, 

 a probe the end of which is tipped with meerschaum. 

 It is used in searching for bullets, its advantage con- 

 sisting in its being streaked by the lead when it comes 

 in contact with the ball. P., Nelaton's, a probe that is 

 capped withunglazed porcelain upon which a leaden 

 ball makes a metallic streak. P. -nippers, an instru- 

 ment used in searching for foreign bodies in wounds. 

 By means of it a minute portion of the foreign body can 

 be withdrawn for examination. P., Scissors, sur- 

 geons' scissors that may be thrust into a sinus, like a 

 probe. P., Sharp-pointed, one having a sharp end 

 for introduction into a wound or sinus P., Stetho- 

 scopic, a probe having the tube of a stethoscope at- 

 tached to the outer end. P., Uterine, a long, flexible 



probe used in exploring the uterine cavity. P., 

 Vertebrated, a probe made of small links so jointed 

 together that it is very flexible. P., Wire, a simple 

 wire used as a probe. 



Problematic ( prob-lem-at' -ik) [7rpo37^ua{r-), a prob- 

 lem]. Uncertain, unsettled. P. Bodies, or Organs, 

 Miiller's name for the tubes of the water-vascular 

 system of invertebrates. 



Probole {prol/-o-U) [-pofid/,?.eiv , to throw forward]. 

 A process, as of bone. 



Proboscidate [pro-bos' -id- at) [-poflooniq, proboscis]. 

 In biology, furnished with a proboscis. 



Proboscis {pro-bos' -is) [^po, before ; f 36aKEiv, to feed, 

 graze]. In biology, any part or organ extending from 

 the anterior end of an animal after the manner of an 

 elephant's trunk ; a long, flexible nose, snout, rostrum, 

 beak, sucking-mouth, tongue, or other buccal or 

 pharyngeal organ. P. -sheath, the receptacle of the 

 proboscis in the Acanthocephala and Aemertina. Cf. 

 Rhynchodceum. 



Procalymma {pro-kal-im'-ah) [itpoKa/.v—reiv, to hang 

 before]. The pudendal apron. 



Procambial {pro-kam' -be-al) [pro, before; cambire, 

 to exchange]. Pertaining to the procambium. 



Procambium {pro-kam' -be-um) [pro, before; cambire, 

 to exchange] . In biology, the primitive undifferenti- 

 ated fibro- vascular tissue. 



Procardium {pro-kar 1 -de-urn) [~po, before ; napdia, 

 heart]. The pit of the stomach. 



Procarp {pro'-karp) [-po, before ; Kapizdq, fruit]. Same 

 as Procarpium. 



Procarpium {pro-kar' -pe-um) [~po, before ; nap— 6c, 

 fruit://., Procarpia~\. In biology, the unfertilized 

 female organ of certain algae {Floridea). It is analo- 

 gous to the pistil of flowering plants. In its simplest 

 form {Porpkyraretr and jYemaliece) it consists of a 

 single cell with a lateral hair-like prolongation, the 

 trichogyne. In higher forms it is composed of one or 

 more infertile cells which make up the trichophore, the 

 function of which is to convey the fertilizing substance 

 from the trichogyne to the carpogone. It is usually 

 formed on the youngest parts of the plant and often 

 originates from the terminal cell of a lateral branch. 



Procatarctic {pro-kat-ark' -tik) [~poKarapxeiv, to begin 

 first]. Primary, predisposing. 



Procatarxis {pro-kat- arks' -is) [izpOKarap^iq, a first be- 

 ginning]. The kindling of a disease into action by a 

 procatarctic cause. 



Procelia, Proccelia {pro-se / -le-ah) [~p6, before ; nuu.ia, 

 hollow]. Same as Paracelia. 



Procelous, Proccelous {pro-se'-lus)[~p6, before; K0i7.oc, 

 hollow]. Being concave in front and convex behind. 



Procephalic {pro-sef-al'-ik, or pro-sef'-al-ik) [~po, be- 

 fore; KEoa7.ii, head]. In biology, of or pertaining to 

 the fore part of the head. 



Procephalon {pro-sef -al-on) [~p6, before ; K£oa7/ t , 

 head]. The anterior part of the head of arthropods. 



Procerebral {proser* -e-bral) [pro, before; cerebrum, 

 cerebrum]. Pertaining to the proce^ebrum. 



Procerebrum {pro-ser* '-e-bruni). See Prosencephalon. 



Procerite ( pros' -er-lt) [~p6, before; kt/mc, horn]. In 

 biology, the long, slender, many-jointed portion of the 

 antenna or feeler of a crustacean. The larger basal 

 joints are the coxocerite, basicerite, scaphocerite, ischio- 

 ceriie, me roc trite ; carpocerite. 



Procerous (pro-se'-rus) [procerus, high]. In biology, 

 tall, or tall and slim. 



Process {pros' -es) [processus; procedere, to issue]. 

 I. A more or less well-defined outgrowth or project- 

 ing structure. 2. Method ; phenomenon ; occur- 

 rence. P., A, B, C. See Sewage, Disposal of. P., 

 Acromion. See Acromion. P., Alar, one of the 



