13-letter words containing si
- ascensiontide — the ten days from Ascension Day to the day before Whit Sunday
- aspergillosis — a rare fungal infection, esp of the mucous membranes or lungs, caused by various species of Aspergillus
- assassinating — Present participle of assassinate.
- assassination — to kill suddenly or secretively, especially a politically prominent person; murder premeditatedly and treacherously.
- assassinators — Plural form of assassinator.
- assiduousness — constant; unremitting: assiduous reading.
- assignability — The quality of being assignable.
- assigned risk — a risk that, under state law, is assigned to an insurer from a pool of insurers who would not otherwise accept it.
- assimilations — Plural form of assimilation.
- assistantship — a graduate post which requires the student to carry out some teaching duties in return for financial assistance
- astereognosis — inability to recognize objects by touch
- astrophysical — Of or pertaining to astrophysics.
- atherogenesis — (medicine) The formation of atheromas, especially on the walls of the arteries.
- austroasiatic — a family of languages spoken in SE Asia and the landsaround the Bay of Bengal and consisting principally of Vietnamese, Khmer, Mon, Khasi, Nicobarese, and the Munda languages.
- autocatalysis — the catalysis of a reaction in which the catalyst is one of the products of the reaction
- autocatharsis — a therapeutic process designed to free unconscious disturbances by having the patient write about his or her experiences, impressions, etc.
- autotoxicosis — autointoxication.
- back emission — the secondary emission of electrons from an anode
- backbone site — A key Usenet, electronic mail and/or Internet site; one that processes a large amount of third-party traffic, especially if it is the home site of any of the regional coordinators for the Usenet maps. Notable backbone sites as of early 1993 include uunet and the mail machines at Rutgers University, UC Berkeley, DEC's Western Research Laboratories, Ohio State University and the University of Texas. Compare rib site, leaf site.
- bacteriolysin — an antibody which, when it combines with bacterial cells, causes lysis of those cells, thus destroying them
- bacteriolysis — the destruction or disintegration of bacteria
- barosinusitis — aerosinusitis.
- basic english — a simplified form of English, proposed by C. K. Ogden and I. A. Richards, containing a vocabulary of approximately 850 of the commonest English words, intended as an international language
- basic fortran — (language) A subset of Fortran.
- basic plumage — the plumage assumed by an adult bird at its complete, usually annual, molt.
- basic process — Military. basic training. a soldier or airman receiving basic training.
- basidiomycete — any fungus of the phylum Basidiomycota (formerly class Basidiomycetes), in which the spores are produced in basidia. The group includes boletes, puffballs, smuts, and rusts
- basidiospores — Plural form of basidiospore.
- bedside table — a small table beside a bed
- bend sinister — a diagonal line bisecting a shield from the top right to the bottom left, typically indicating a bastard line
- bibliogenesis — the art of producing and publishing books.
- bioconversion — the use of biological processes or materials to change organic substances into a new form, such as the conversion of waste into methane by fermentation
- biphasic pill — a drug with two dosage levels over the period taken, as an oral contraceptive.
- bitch session — a discussion in which people complain or gripe, usually about a shared experience: Their first date turned into a four-hour bitch session about their ex-spouses' lawyers.
- black russian — a drink made from one part coffee liqueur and two parts vodka, served over ice.
- blastogenesis — the theory that inherited characteristics are transmitted only by germ plasm
- blastomycosis — a fungal infection particularly affecting the lungs
- blot analysis — a technique for analysing biological molecules, such as proteins (Western blot analysis), DNA (Southern blot analysis), and RNA (Northern blot analysis), involving their separation by gel electrophoresis, transfer to a nitrocellulose sheet, and subsequent analysis by autoradiography
- botryomycosis — a disease, usually of horses, caused by a bacterial infection (usually, Staphylococcus aureus) producing tumorous growths esp. after castration or a wound or injury
- brassicaceous — belonging to the plant family Brassicaceae, an alternative name for the plant family Cruciferae.
- british asian — A British Asian person is someone of Indian, Pakistani, or Bangladeshi origin who has grown up in Britain.
- broca-aphasia — a type of aphasia caused by a lesion in Broca's area of the brain, characterized by misarticulated speech and lack of grammatical morphemes.
- building site — A building site is an area of land on which a building or a group of buildings is in the process of being built or altered.
- bush sickness — an animal disease caused by a cobalt deficiency in old bush country
- business card — A person's business card or their card is a small card which they give to other people, and which has their name and details of their job and company printed on it.
- business case — a briefcase or attaché case.
- business park — an area specially designated and landscaped to accommodate business offices, warehouses, light industry, etc
- business plan — A business plan is a detailed plan for setting up or developing a business, especially one that is written in order to borrow money.
- business suit — a formal suit suitable for wearing to work
- business trip — a journey made somewhere and back again for business purposes in one's working capacity