- formula
**1.**A*recipe*or*prescription*containing directions for the compounding of a*medicinal**preparation*.**2.**In*chemistry*, a*symbol*or collection of symbols expressing the*number*of atoms of the*element*or elements forming one*molecule*of a*substance*, together with, on occasion, information concerning the arrangement of the atoms within the*molecule*, their*electronic**structure*, their charge, the nature of the bonds within the*molecule*, etc.**3.**An*expression*by symbols and numbers of the*normal**order*or arrangement of parts or structures.**4.**A mathematic*relationship*or*principle*, typically provided via an*equation*. [L.*dim.*of forma,*form*]-the*Arneth*f.*normal*,*approximate**ratio*of*polymorphonuclear*neutrophils, based on the*number*of lobes in the*nuclei*, as follows: 1*lobe*, 5%; 2 lobes, 35%; 3 lobes, 41%; 4 lobes, 17%; 5 lobes, 2%.-a f. for correcting the observed QT*Bazett*f.*interval*in the*electrocardiogram*for*cardiac**rate*(R-R interval): corrected QT = Q-T sec/√RR sec.-a f. used to calculate the*Bernhardt*f.*ideal**weight*, in kilograms, for an*adult*; it is the*height*in centimeters times the*chest**circumference*in centimeters divided by 240.-a*Black*f.*translation*of*Pignet*f. into British measurements:*F*= (W + C) − H; F is the*empirical**factor*, W is the*weight*in pounds, C the*chest*girth in inches at full*inspiration*, and*H*the*height*in inches; a man is classed as very strong when*F*is over 120, strong between 110 and 120, good 100 to 110, fair 90 to 100, weak 80 to 90, very weak under 80.-a fully developed man (30 years old) should weigh as many kilograms as he is centimeters in*Broca*f.*height*over and above 1*meter*.-SYN:*Christison*f.*Häser*f..-SYN:*constitutional*f.*structural*f..-a statement in*dental*f.*tabular**form*of the*number*of each kind of*teeth*in the jaw; the*dental*f. for man is, for the*deciduous**teeth*: for the permanent*teeth*:-a f. for predicting a man's*DuBois*f.*surface**area*from*weight*and*height*:*A*= 71.84W^{0.425}H^{0.725}, where*A*=*surface**area*in cm^{2}, W =*weight*in kg, and*H*=*height*in cm.-**electrical f.**a graphic*representation*by means of symbols of the*reaction*of a*muscle*to an electrical*stimulus*.-in*empirical*f.*chemistry*, a f. indicating the kind and*number*of atoms in the molecules of a*substance*, or its*composition*, but not the*relation*of the atoms to each other or the intimate*structure*of the*molecule*. SYN:*molecular*f..-a*Flesch*f.*method*of determining the difficulty of a written*passage*by a formulation that provides an*estimate*of how many people in the U.S. would be able to read and understand the*passage*; used in determining*patient**comprehension*of*hospital*consent forms.-the correct*Florschütz*f.*relation*of*height*to the*abdominal**circumference*:*L*: (2B − L),*L*representing the individual's*height*, and B the*circumference*of the*abdomen*; the*normal**value*so determined would be 5, and any below that would indicate*obesity*.-a f. for calculating the*Gorlin*f.*area*of the*orifice*of a*cardiac**valve*, based on*flow*across the*valve*and the*mean*pressures in the chambers on either*side*of the*valve*.-**graphic f.**SYN:*structural*f..-a f. to determine the*Häser*f.*number*of grams of*urinary*solids per*liter*, obtained by multiplying 2.33 by the last two figures of the*specific**gravity*of the*urine*. SYN:*Christison*f.,*Trapp*f., Trapp-*Häser*f..-See*Haworth*perspective and conformational formulas*Haworth*perspective formulas of*cyclic*sugars.-a*Jellinek*f.*method*of estimating the*prevalence*of*alcoholism*in a nation's*population*, based on the*assumption*that a predictable proportion of persons addicted to*alcohol*die of*cirrhosis*of the*liver*.-a f. to calculate*Ledermann*f.*alcohol*dependancy levels.*Ledermann*showed empirically that the*distribution*of*alcohol**consumption*in a*population*is log*normal*; the f. used this observation to*estimate*the*prevalence*of various degrees of*alcohol**dependency*. Some questions have been raised about the*validity*of*Ledermann*observations.-a f. for estimating from the*Long*f.*specific**gravity*of a*specimen*of*urine*the*approximate*amount of solids in grams per*liter*; the last two figures of the*value*for*specific**gravity*are multiplied by 2.6. SYN:*Long*coefficient.-a f. for determining the age (in days) of a human*Mall*f.*embryo*; calculated as the square*root*of its*length*(measured from*vertex*to*breech*) in millimeters multiplied by 100.-**Meeh-**a f. for predicting*Dubois*f.*surface**area*, assuming that it is proportional to the 23*power*of the*body**weight*. SYN:*Meeh*f..-**Poisson-**a f. to determine the statistical*Pearson*f.*error*in calculating the*endemic**index*of*malaria*: let N = total*number*of children under 15 years in a locality;*n*= total*number*examined for the spleen-rate; x =*number*found with enlarged*spleen*; (x/n)100 = spleen-rate; e% = percentage of*error*; the percentage*error*will be, by this f.:-A = grams of*Ranke*f.*albumin*per*liter*of a*serous**fluid*: then, A = (sp. gr. − 1000) × 0.52 − 5.406.-in*rational*f.*chemistry*, a f. that indicates the*constitution*as well as the*composition*of a*substance*.-a means of estimating the*Reuss*f.*approximate*amount of*albumin*in a*transudate*or*exudate*; 38 (sp. gr. - 1.000) − 2.8 results in a*value*that is a practicable*indication*of the percentage of*albumin*in the*fluid*.-a f. for estimating the percentage of*Runeberg*f.*albumin*in a*serous**fluid*, similar to*Reuss*f. except that, instead of 2.8, 2.73 is subtracted in the instance of a*transudate*, and 2.88 in that of an*inflammatory**exudate*.-SYN:*spatial*f.*stereochemical*f..-a*stereochemical*f.*chemical*f. in which the arrangement of the atoms or*atomic*groupings in*space*are indicated. SYN:*spatial*f..-a f. in which the connections of the atoms and groups of atoms, as well as their kind and*structural*f.*number*, are indicated. SYN:*constitutional*f., graphic f..-**Toronto f. for**a*pulmonary**artery**banding**technique*that provides a general*guide*for the size of the*band*relative to the patient's*weight*.-SYN:*Trapp*f.*Häser*f..-**Trapp-**SYN:*Häser*f.*Häser*f..-a f. indicating the*vertebral*f.*number*of vertebrae in each*segment*of the*spinal**column*; for humans it is C. 7, T. 12, L. 5, S. 5, Co. 4 = 33, the letters standing for*cervical*,*thoracic*,*lumbar*,*sacral*, and*coccygeal*.* * *

**1 a)**a recipe or prescription giving method and proportions of ingredients for the preparation of some material (as a medicine)**b)**a milk mixture or substitute for feeding an infant typically consisting of prescribed proportions and forms of cow's milk, water, and sugar*also*a batch of this made up at one time to meet an infant's future requirements (as during a 24-hour period)**2)**a symbolic expression showing the composition or constitution of a chemical substance and consisting of symbols for the elements present and subscripts to indicate the relative or total number of atoms present in a molecule*<the \formula for ethyl alcohol is C*_{2}*H*_{5}*OH> see***EMPIRICAL FORMULA***,***MOLECULAR FORMULA***,***STRUCTURAL FORMULA*** * *

for·mu·la (forґmu-lə) pl.*formulas*or*forґmulae*[L., dim. of*forma*form] a specific statement, using numerals and other symbols, of the composition of, or of the directions for preparing, a compound, such as a medicine, or of a procedure to follow for obtaining a desired value or result; a simplified statement, using numerals and symbols, of a single concept. See also*chemical f.*

*Medical dictionary.
2011.*

**Synonyms**:

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