ACR 



alcros, high, extreme ; omos, a 

 shoulder), the projecting or outer 

 part or process of the scapula or 

 shoulder : acromial, a., ak-rdm'- 

 i>dl, of or belonging to the ac- 

 romium : acromiales cutanei, 

 dk-rom'-i-dl'-ez ku-tdn'-Z-i (L. 

 acromiales, plu., pert, to the 

 acromium ; cutanei, plu., belong- 

 ing to the skin), designating 

 those nerves which pass over the 

 acromium, and are thence dis- 

 tributed to the skin: acromio, 

 dk'rom f 'i'd, indicating connection 

 with the acromion : acromio- 

 clavicular, kldv-iktul'dr (L. 

 clavis, a key), denoting the art- 

 iculation at the shoulder of the 

 outer end of the clavicle in the 

 acromion process of the scapula ; 

 also denoting two ligaments of the 

 scapula and clavicle, named re- 

 spectively the ' superior ' and the 

 'inferior.' 



acropetal, a., ak-rop'et-dl (Gr. 

 akros, at the highest point ; L. 

 peto, I seek), in bot., seeking the 

 summit ; applied to the develop- 

 ment of lateral shoots from an axis. 



acrospire, n.,dk f -ro- spir(Gr. akros, 

 the summit ; speira, a spiral line), 

 the first shoot or sprout at the 

 end of a germinating seed : acro- 

 spore, n., dh'-ro-spor (Gr. spora, 

 seed), a spore borne on the summit 

 of a thread. 



actea, n., dk-te'd, or actsea race- 

 mosa, dk-te'd ras'em'dzf-a (Gr. 

 aktaia, the elder tree ; L. race- 

 mosus, full of clusters, clustering), 

 in med. , the black snake-root, black 

 cohosh or bugbane, a sedative 

 used in the treatment of rheum- 

 atism, Ord. Ranunculacese. 



actinenchyma, n . , akt'-ln Zng'kim - a 

 (Gr. aklin, a ray ; engchuma, 

 an infusion), in lot., cellular 

 tissue having a starlike or stel- 

 late form. 



actinism, n., tikt'-m'fam(Gr. aktin, 

 a ray), the chemical action of 

 sunlight: actinocarpous, a., dkt< 

 m-d'kdrp'-us (Gr. karpos, fruit), 



ACU 



having trophosperms radiated like 

 the rays of fruit : actinograms, 

 n. plu., act-in'- o- grams (Gr. 

 gramma, a letter), the results 

 recorded by the actinograph : 

 actinograph, n., dkt-m-d-grdf 

 (Gr. grapho, I write), an instru- 

 ment for recording the quantity 

 of actinism present : actinog- 

 raphy, n., -rdf-t, a description 

 of the rays of light : actinoid, n., 

 akt'-ln-oyd (Gr. eidos, resem- 

 blance), resembling a ray : actin- 

 ology, n., akt r -in>ol'-6'jl (Gr. 

 logos, discourse), the doctrine of 

 the rays of light : actinomeres, n. 

 plu., akt'in-omf-er-ez (Gr. meros, 

 a part), in zool., the lobes which 

 are mapped out on the surface of 

 the body of the ctenophora by the 

 ctenophores, or comb -like rows 

 of cilia : Actinosoma, n., dkt'm- 

 o-som'-d (Gr. soma, a body), the 

 entire body of any actinozoon, 

 whether simple as in the sea- 

 anemones, or composed of several 

 zooids as in most corals : Actino- 

 zoon, n., dkt r >in>6'Zd'dn, Actino- 

 zoa, n. plu., -zo'd (Gr. zoo n, an 

 animal), the division of the 

 Cselenterata, of which the sea- 

 anemones are the type. 



aculeate, &.,ak-ul'-e'dt(L. aciileus, 

 a prickle or thorn from dcus, a 

 needle), having prickles or sharp 

 points: aculeiform, a., aTc r 'Ul-e f 'l- 



form (L. forma, shape), formed 

 like a prickle or thorn : aculeus, 

 n., ak'ul'-e-us, a prickle forming 

 a process of the bark only, as in 

 the rose : aculei, plu., ak-uV-e-l. 



acuminate, a., ak-um'-m-dt (L. 

 acumen, a point, acummis, of a 

 point), in bot., drawn out into a 

 long point ; tapering : acuminif- 

 erous, a., ak-um'in-if-er'us (L. 

 fero, I bear), in zool., having 

 pointed tubercles : acuminulate, 

 a., dk''Um'in f -ul'dt, having a very 

 sharp taper-point. 



acupressure, n., ak-u-presh'-ur (L. 

 ticus, a needle ; pressum, to 

 press), the employment of needles 



