Citations:thumbable

Adjective: "capable of being handled, manipulated, or operated with a thumb or thumbs"

 * 1988 — Tay Vaughan, Using HyperCard: From Home to HyperTalk, Que Corp (1988), ISBN 9780880223409:
 * The virtuality of on-screen pictures of buttons as actual fingerable and thumbable objects establishes itself without notice.
 * 1999 — Frederick G. Dillen, Fool, Algonquin Books of Chapel Hill (1999), ISBN 9781565122345, page 67:
 * Let his father suck his teeth and look at that line of his son's name proved in thumbable silver.
 * 2001 — Toni Kistner, "Gadget love strikes the enterprise", Network World, 26 March 2001:
 * One peek at the wireless e-mail and personal information manager device — complete with tiny thumbable keyboard — and she was hooked.
 * 2003 — Richard V. Dragan, "Improved BlackBerry Delivers End-to-End Messaging", PC Magazine, 5 August 2003:
 * The backlit monochrome screen is easy to see, and we found the thumbable keyboard easier to type on than earlier BlackBerry models.
 * 2008 — Ian McDonald, "The Tear", in Galactic Empires (ed. Gardner Dozois), Science Fiction Book Club (2008), ISBN 9781582882918:
 * She had a barbarous accent and continental manners, but Nejben found himself thinking often about her small, flat boy-breasts with their big, thumbable nipples.
 * 2009 — Mitch Allen, Palm WebOS, O'Reilly Media (2009), ISBN 9780596155254, page 91:
 * In addition to the advantages of keyboarding on thumbable keyboards, all text fields support trackball mode cursoring, smart deletion, and text selection.

Adjective: "(of a book) compellingly readable or easy to thumb through"

 * 1905 — H. W. Boynton, "Little Burney", The New York Times, 25 February 1905:
 * It is for these things that we give the "Diary" a place of honor among thumbable volumes on our shelves.
 * 1990 — Arts Magazine, Volume 65, Issues 2-5:
 * One of last season's great pleasures was Sperone Westwater's exhibition of Wegman's drawings, and the catalogue they published for the occasion, William Wegman: Why Draw? preserves, in a satisfyingly portable and thumbable form, Wegman's adventures in what he calls this "deeply important routine mode of expression."
 * 1998 — Philip E. Baruth & Nancy M. West, "The History of 'The Moving Image': Rethinking Movement in the Eighteenth-Century Print Tradition and the Early Years of Photography and Film", in Questioning History: The Postmodern Turn to the Eighteenth Century (ed. Greg Clingham), Associated University Presses (1998), ISBN 0838753833, page 115:
 * By reducing the scale dramatically, illustrating crudely and deliberately creating a thumable book for children, these late eighteenth-century graphic pirates turned Laroon's work into something more closely resembling the photographic "flip-books" that Carroll found so difficult to categorize.
 * 1999 — British Cactus & Succulent Journal, Volumes 17-18, page xxix:
 * But Cirio themselves have evidently spared no expense to produce what must surely be one of the most attractive and thumbable cactus books ever; do get a copy before it goes out of print!
 * 2001 — Julie Kaewert, Unsigned: A Booklover's Mystery, Bantam Books (2001), page 13:
 * Only London's finest collection of comfortable, thumbable antiquarian books, I thought, as I watched him sink into a chair near the empty fireplace.