13-letter words containing b, r, n
- lacrimal bone — a small, thin, membrane bone forming the front part of the inner wall of each orbit.
- lambeosaurine — Any crested hadrosaurid dinosaur of the subfamily Lambeosaurinae.
- lamellibranch — bivalve.
- lavender-blue — coloured between blue and pale or light bluish-purple to a very pale violet colour
- least bittern — any of several tawny brown herons that inhabit reedy marshes, as Botaurus lentiginosus (American bittern) of North America, and B. stellaris, of Europe.
- lemon verbena — a plant, Aloysia triphylla, having long, slender leaves with a lemonlike fragrance.
- lepton number — in a process involving elementary particles, the total number of leptons minus the total number of antileptons.
- liberalminded — Having a liberal opinion or stance.
- liberationism — the principles of liberationists
- liberationist — the act of liberating or the state of being liberated.
- librarianship — a profession concerned with acquiring and organizing collections of books and related materials in libraries and servicing readers and others with these resources.
- libyan desert — a desert in N Africa, in E Libya, W Egypt, and NW Sudan, W of the Nile: part of the Sahara. About 650,000 sq. mi. (1,683,500 sq. km).
- line breeding — a form of inbreeding directed toward keeping the offspring closely related to a superior ancestor.
- lingual brace — a specialized dental brace that fits behind the teeth so that it is not visible when the wearer speaks or smiles.
- loebner prize — (artificial intelligence) An annual competition in artificial intelligence started by Dr. Hugh Loebner of New York City in 1991. A $100,000 prize is offered to the author of the first computer program to pass an unrestricted Turing test. Annual competitions are held each year with a $2000 prize for the best program on a restricted Turing test. Sponsors of previous competitions include: Apple Computer, Computerland, Crown Industries, GDE Systems, IBM Personal Computer Company's Center for Natural Computing, Greenwich Capital Markets, Motorola, the National Science Foundation, The Alfred P. Sloan Foundation, and The Weingart Foundation. The 1995 and 1996 events were unrestricted Turing Tests, requiring computer entries to converse indefinitely with no topic restrictions. So far, even the best programs give themselves away almost immediately, either by simple grammatical mistakes or by repetition. Complete transcripts and IBM compatible diskettes that play the 1991, 1992, and 1993 conversations in real-time are available for purchase from the Cambridge Center for Behavioral Studies (telephone: +1 (617) 491 9020, Fax: 1072). Sponsorship opportunities are available.
- london bridge — a bridge over the Thames between the City of London on the north side, and Southwark on the south side.
- lower abdomen — lowest part of the belly
- luang prabang — Louangphrabang.
- lubber's knot — an improperly made reef or square knot, likely to slip loose.
- lubber's line — a vertical line on the forward inner side of the bowl of a fixed compass, used as a reference mark indicating the heading of a vessel.
- lunar orbiter — one of a series of space probes that orbited and photographed the moon in 1966 and 1967.
- lunar rainbow — moonbow.
- luxembourgian — of or relating to Luxembourg, its people, or their language.
- macroglobulin — A plasma globulin of high molecular weight.
- malabsorbtion — Misspelling of malabsorption.
- malabsorption — faulty absorption of nutritive material from the intestine.
- mandibuliform — Having the form of a mandible; - said especially of the maxill\u00e6 of an insect when hard and adapted for biting.
- mao inhibitor — any of various substances, as isocarboxazid and phenelzine, that block enzymatic breakdown of certain monoamine neurotransmitters: used to treat severe depression. Abbreviation: MAOI.
- marbleization — The process of marbleizing.
- marching band — musical group that parades
- mariage blanc — unconsummated marriage
- matchboarding — a construction of matchboards.
- melbourne cup — an annual horse race run in Melbourne, since 1861
- membranaceous — Resembling or having properties of a membrane.
- membrane bone — a bone that develops from membranous tissue.
- membranophone — any musical instrument, as a drum, in which the sound is produced by striking, rubbing, or blowing against a membrane stretched over a frame.
- memorableness — Memorability.
- mensurability — The quality of being mensurable.
- merchant bank — a private banking firm engaged chiefly in investing in new issues of securities and in accepting bills of exchange in foreign trade.
- messenger boy — A messenger boy is a boy who is employed to take messages to people.
- methylparaben — a fine, white, needlelike substance, C 8 H 8 O 3 , used chiefly as a preservative in foods and pharmaceuticals.
- microbalances — Plural form of microbalance.
- microblogging — a blog that is smaller than a traditional blog and contains very short entries.
- microbusiness — A business that operates on a very small scale.
- military band — a musical band, usually made up of players of wind, percussion and some brass instruments, that play at military functions, etc
- mineralizable — Capable of being mineralized.
- minisubmarine — A small submarine.
- miserableness — The property of being miserable.
- misobservance — a failure to observe thoroughly or properly
- mistranscribe — to make a written copy, especially a typewritten copy, of (dictated material, notes taken during a lecture, or other spoken material).