| seasonal affective disorder | A syndrome characterised by depressions that recur annually at the same time each year, usually during the winter months. Other symptoms include anxiety, irritability, decreased energy, increased appetite (carbohydrate cravings), increased duration of sleep, and weight gain. Sad (seasonal affective disorder) can be treated by daily exposure to bright artificial lights (phototherapy), during the season of recurrence. (12 Dec 1998) |
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| seat | 1. To place on a seat; to cause to sit down; as, to seat one's self. "The guests were no sooner seated but they entered into a warm debate." (Arbuthnot) 2. To cause to occupy a post, site, situation, or the like; to station; to establish; to fix; to settle. "Thus high . . . Is King Richard seated." (Shak) "They had seated themselves in new Guiana." (Sir W. Raleigh) 3. To assign a seat to, or the seats of; to give a sitting to; as, to seat a church, or persons in a church. 4. To fix; to set firm. "From their foundations, loosening to and fro, They plucked the seated hills." (Milton) 5. To settle; to plant with inhabitants; as to seat a country. 6. To put a seat or bottom in; as, to seat a chair. Origin: Seated; Seating. 1. The place or thing upon which one sits; hence; anything made to be sat in or upon, as a chair, bench, stool, saddle, or the like. "And Jesus . . . Overthrew the tables of the money changers, and the seats of them that sold doves." (Matt. Xxi. 12) 2. The place occupied by anything, or where any person or thing is situated, resides, or abides; a site; an abode, a station; a post; a situation. "Where thou dwellest, even where Satan's seat is." (Rev. Ii. 13) "He that builds a fair house upon an ill seat committeth himself to prison." (Bacon) "A seat of plenty, content, and tranquillity." (Macaulay) 3. That part of a thing on which a person sits; as, the seat of a chair or saddle; the seat of a pair of pantaloons. 4. A sitting; a right to sit; regular or appropriate place of sitting; as, a seat in a church; a seat for the season in the opera house. 5. Posture, or way of sitting, on horseback. "She had so good a seat and hand she might be trusted with any mount." (G. Eliot) 6. <machinery> A part or surface on which another part or surface rests; as, a valve seat. <zoology> Seat worm, the pinworm. Origin: OE. Sete, Icel. Saeti; akin to Sw. Sate, Dan. Saede, MHG. Saze, AS. Set, setl, and E. Sit. See Sit, and cf. Settle. Source: Websters Dictionary (01 Mar 1998) |
| seat belts | Restraining belts fastened to the frame of automobiles, aircraft, or other vehicles, and strapped around the person occupying the seat in the car or plane, intended to prevent the person from being thrown forward or out of the vehicle in case of sudden deceleration. (12 Dec 1998) |
| seatworm | <zoology> A small nematoid worm (Oxyurus vermicularis), which is parasitic chiefly in the rectum of man. It is most common in children and aged persons. Source: Websters Dictionary (01 Mar 1998) |
| seatworms | Small nematode, Enterobius vermicularis, that is responsible for intestinal infection in humans. It appears as a small thread-like worm approximately 3-5mm in length. Common symptoms include anal itching that is worse at night when the female worm migrates to the anus to lay its eggs. Thin, white, thread-like worms may be visible at the anal opening or in the stools. The tape test can be performed by placing the sticky side of the tape across the anal opening for several seconds. The tape is then transferred to a glass slide where eggs may be seen through the microscope. (27 Sep 1997) |
| seawand | <botany> See Sea girdles. Source: Websters Dictionary (01 Mar 1998) |
| seaward | Directed or situated toward the sea. "Two still clouds . . . Sparkled on their seaward edges like a frosted fleece." (G. W. Cable) Source: Websters Dictionary (01 Mar 1998) |
| seaware | <botany> Seaweed; especially, coarse seaweed. See Ware, and Sea girdles. Origin: Cf. AS. Sawar seaweed. Source: Websters Dictionary (01 Mar 1998) |
| seaweed | 1. Popularly, any plant or plants growing in the sea. 2. <botany> Any marine plant of the class Algae, as kelp, dulse, Fucus, Ulva, etc. Source: Websters Dictionary (01 Mar 1998) |
| seawife | <zoology> A European wrasse (Labrus vetula). Source: Websters Dictionary (01 Mar 1998) |
| sea anemone sting |
Contact with the nematocysts or stinging cells of certain species of the flower-like marine coelenterates causing severe dermatitis with chronic ulceration. In some cases, signs and symptoms of a systemic reaction develop, incl
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| seagull murmur |
A murmur that resembles the cry of a seagull; sometimes associated with aortic insufficiency.
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| seal fin deformity |
Obsolete term for ulnar deviation of the fingers in rheumatoid arthritis.
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| seasonal conjunctivitis |
Allergic inflammation of the conjunctiva that occurs because of exposure to pollens, grasses, and other antigens.
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| seating system |
Adapted seating device.
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| SEA | fastener consisting of a resinous composition that is plastic when warm |
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| SEA | an indication of approved or superior status |
| SEA | a stamp affixed to a document (as to attest to its authenticity or to seal it) |
| SEA | the pelt or fur (especially the underfur) of a seal |
| SEA | decide irrevocably |
| SEA | hunt seals |
| SEA | cover with varnish |
| SEA | close with or as if with a seal |
| SEA | make tight |
| SEA | affix a seal to |
| SEA | close with or as if with a tight seal |
| SEA | an abnormality of development in which the upper part of an arm or leg is missing so the hands or feet are attached to the body like stumps |