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George

ballooning, vbl. n.
. a. The science and practice of ascending in and making use of balloons; aeronautics. Also attrib.

1784 H. SMEATHMAN Let. 16 July in Pettigrew Mem. of Lettsom (1817) II. 275 This I thought might have been done by ballooning. 1821 C. MATHEWS Mem. III. viii. 178 A very learned dissertation on ballooning. 1870 Pall Mall G. 7 Sept. 4 Military ballooning. 1877 BLACKIE Wise Men 343 Helmless balloonings in the pathless air. 1961 Daily Tel. 1 May 13/1 President of the ballooning club in Holland.
b. Aeronaut. (See BALLOON v. 5.)

1922 Flight 1 June 317/2 Some serious porpoising or ‘ballooning’..may occur. 1935 P. W. F. MILLS Elem. Pract. Flying vii. 103 The underlying cause of ballooning is usually too fast a gliding speed.

2. a. Dilatation of the walls of a cavity of the body as a symptom or for therapeutic purposes.

1889 T. BRYANT in Lancet 5 Jan. 8/1 On the diagnostic value of ‘ballooning of the rectum’ in cases of stricture of the bowel... The surgeon will often find..that he has entered a cavity, the walls of which are expanded or ‘ballooned’... The extent of ballooning will be found to vary in every case. 1890 BILLINGS Med. Dict., Ballooning, vaginal, distension of vagina as by tampons, water- or air-bags, etc. 1893 A. S. ECCLES Sciatica 3 In the remaining nine cases there was more or less ballooning of the rectum.
b. Path. Distension of cells, etc. (see quot. 1913).

1913 E. M. BROCKBANK in Med. Chron. Sept. 292 When the acidity of the gastric juice reaches a certain degree..the red corpuscles are seen to distend in a most peculiar manner which for descriptive convenience I describe as ‘ballooning’. 1962 Lancet 28 Apr. 885/2 Severe fatty change of the fine droplet type, without ‘ballooning’ of the cells.
3. Spinning. (See quots.)

1904 GOODCHILD & TWENEY Technol. & Sci. Dict. 39/1 Ballooning (Cotton Spinning), a defect in ring spinning caused by the high velocity of the ring traveller. This has the effect of causing the spun thread to fly outwards as it winds round the bobbin. 1924 T. LAWSON Woollen Yarn Production p. ix, Ballooning, extension of the arc of the axis of the spinning thread. 1963 A. J. HALL Textile Sci. v. 261 (caption) Showing how the accumulation of static electricity on a thread..can cause the individual fibres of which the thread is composed to repel each other and so cause ‘ballooning’ sufficient to make the manipulation of the thread difficult.