roll(1) (iou) and libration (medicine)

roll(1) (iou)

roll noun1. ME.

I.
A piece of parchment or paper (intended to be) written on and rolled up for convenient handling, carrying, or storage; a scroll. ME.
spec. A document, esp. an official record, in a rolled form. Freq. with specifying word or phr. ME.
a. A list or catalogue of names, deeds, etc. Chiefly fig. ME.
b. An official list or register; spec. (a) a muster-roll; (b) a school register; (c) Scots Law a list of cases coming before a judge or court; (d) the list of those qualified to practise as solicitors (usu. in pl.). Also, the total numbers on such an official list. LME.
II.
A cylinder formed by turning flexible material (esp. cloth or paper) over and over on itself without folding; this as a definite measure. LME.
b. A quantity of banknotes rolled together; transf. the money a person possesses. US & Austral. M19.
c. A quantity of photographic or cinematographic Film supplied rolled up. L19.
d. = Music-roll (b) s.v. Music noun. E20.
a. An item of Food that is rolled up, esp. round a filling, before being cooked. Usu. with specifying word. LME.
b. A small individual loaf of bread, properly one rolled or doubled over before Baking (also bread roll); this with a specified filling. L16.
B. Malamud Poured..milk into his tea and ate a buttered roll.
A cylindrical or semicylindrical mass of or of something. LME.
M. H. Kingston Her rolls of fat bounce..and rub together.
b. Architecture. A spiral scroll as in an Ionic capital; a moulding of convex section. E17.
c. Building. A rounded strip of wood to which the flashing is attached on the ridge or the lateral joints of a roof. M19.
a. A small quantity of cloth, wool, etc., rolled up to form an ornamental band. LME-E18.
b. A bandage; = ROLLER noun1 6. LME-L16.
c. A round cushion or pad, esp. one forming part of a woman's head-dress. Now only spec. (dial.), an annular pad to ease the carrying of heavy articles on the head. LME.
A part of something which is rolled or turned over. E16.
Geology. An orebody in sedimentary rock that has a C- or S-shaped cross-section cutting across bedding. Freq. attrib. M20.
III.
A cylinder or roller, esp. one used to shape metal in a rolling-mill. LME.
b. Bookbinding. A revolving patterned tool used in impressing and gilding; the pattern produced by this. M17.
Phrases: a roll Jack Rice couldn't jump over Austral. slang a large quantity of money. bread roll: see sense 5b above. call the roll take a roll-call. crescent roll: see CRESCENT adjective 2. Dutch roll: see DUTCH adjective. French roll: see French adjective & noun. jelly roll: see JELLY noun1 & verb. Master of the Rolls a judge who presides over the Civil Division of the Court of Appeal in England and Wales, originally being the keeper of the public records. porteous roll: see PORTEOUS 2. roll of honour a list of those honoured, esp. the dead in war. strike off the rolls debar (esp. a solicitor) from practising after dishonesty etc. SWISS roll. the Rolls Hist. the former buildings in Chancery Lane in which the records in the custody of the Master of the Rolls were kept.
Comb.: roll-call noun & verb (a) noun a calling out of names from a list in order to establish who is present; US a calling out of a list of members of a legislative body to establish how each wishes to vote; (b) verb trans. call the roll for (a group of people); roll-collar a turned-over collar on a garment; roll feed a feed mechanism supplying paper, strip metal, etc., by means of rollers; roll-formed adjective formed by roll-forming; roll-forming cold forming of metal by repeated passing between rollers; roll latten: see LATTEN 1; roll mark: produced on sheet metal flattened by an imperfect set of rollers; roll-neck noun & adjective (a) noun a high loosely turned-over collar; a garment with such a collar; (b) adjective (of a garment) having a roll-neck; roll-necked adjective = roll-neck (b) above.

libration (medicine)

libration

1. The act or state of librating.

2. <astronomy> A real or apparent libratory motion, like that of a balance before coming to rest. Libration of the moon, any one of those small periodical changes in the position of the moon's surface relatively to the earth, in consequence of which narrow portions at opposite limbs become visible or invisible alternately. It receives different names according to the manner in which it takes place; as: (a) Libration in longitude, that which, depending on the place of the moon in its elliptic orbit, causes small portions near the eastern and western borders alternately to appear and disappear each month. (b) Libration in latitude, that which depends on the varying position of the moon's axis in respect to the spectator, causing the alternate appearance and disappearance of either pole. (c) Diurnal or parallactic libration, that which brings into view on the upper limb, at rising and setting, some parts not in the average visible hemisphere.

Origin: L. Libratio: cf. F. Libration.

Source: Websters Dictionary

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