| BAT | basic aid training; best available technology; blunt abdominal trauma; brown adipose tissue |
|---|---|
| PBW | posterior bite wing |
| Awd | Abnormal wing disc |
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| BAT | Brown Adipose Tissue |
| IBAT | Interscapular BAT |
| mwh | Multiple wing hair |
| Su(Hw) | Suppressor of Hairy wing |
| bat | 1. A large stick; a club; specifically, a piece of wood with one end thicker or broader than the other, used in playing baseball, cricket, etc. 2. <chemical> Shale or bituminous shale. 3. A sheet of cotton used for filling quilts or comfortables; batting. 4. A part of a brick with one whole end. <machinery> Bat bolt, a bolt barbed or jagged at its butt or tang to make it hold the more firmly. Origin: OE. Batte, botte, AS. Batt; perhaps fr. The Celtic; cf. Ir. Bat, bata, stick, staff; but cf. Also F. Batte a beater (thing), wooden sword, battre to beat. <zoology> One of the Cheiroptera, an order of flying mammals, in which the wings are formed by a membrane stretched between the elongated fingers, legs, and tail. The common bats are small and insectivorous. See Cheiroptera and Vampire. <zoology> Bat tick, a wingless, dipterous insect of the genus Nycteribia, parasitic on bats. Origin: Corrupt. From OE. Back, backe, balke; cf. Dan. Aften-bakke]/> (aften evening), Sw. Natt-backa]/> (natt night), Icel. Ler-blaka]/> (ler leather), Icel. Blaka to flutter. Source: Websters Dictionary (01 Mar 1998) |
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| bat ear | Congenital deformity of the external ear, with poor development of helix and anthelix. Synonym: bat ear. (05 Mar 2000) |
| sea bat | <zoology> See Batfish . Source: Websters Dictionary (01 Mar 1998) |
| acoustic shadow | Sonographic appearance of reduced echo amplitude from regions lying beyond an attenuating object. Compare: acoustic enhancement. (05 Mar 2000) |
| Ponfick's shadow | A hypochromic, crescent-shaped erythrocyte, probably resulting from artifactual rupture of a red cell with loss of haemoglobin. Synonym: achromacyte, achromatocyte, ghost corpuscle, phantom corpuscle, Ponfick's shadow, shadow corpuscle, shadow, Traube's corpuscle. Origin: G. A-priv. + chroma, colour, + kytos, hollow (cell) (05 Mar 2000) |
| scissors-shadow | A distorted image seen in mixed astigmatism by retinoscopy. (05 Mar 2000) |
| hilar shadow | Radiographic hilum of the lung; a composite radiographic shadow of the central pulmonary arteries and veins, with associated bronchial walls and lymph nodes, within the right or left lung. (05 Mar 2000) |
| shadow | 1. Shade within defined limits; obscurity or deprivation of light, apparent on a surface, and representing the form of the body which intercepts the rays of light; as, the shadow of a man, of a tree, or of a tower. See the Note under Shade. 2. Darkness; shade; obscurity. "Night's sable shadows from the ocean rise." (Denham) 3. A shaded place; shelter; protection; security. "In secret shadow from the sunny ray, On a sweet bed of lilies softly laid." (Spenser) 4. A reflected image, as in a mirror or in water. 5. That which follows or attends a person or thing like a shadow; an inseparable companion; hence, an obsequious follower. "Sin and her shadow Death." (Milton) 6. A spirit; a ghost; a shade; a phantom. "Hence, horrible shadow!" 7. An imperfect and faint representation; adumbration; indistinct image; dim bodying forth; hence, mystical reprresentation; type. "The law having a shadow of good things to come." (Heb. X. 1) "[Types] and shadows of that destined seed." (Milton) 8. A small degree; a shade. "No variableness, neither shadow of turning." 9. An uninvited guest coming with one who is invited. "I must not have my board pastered with shadows That under other men's protection break in Without invitement." (Massinger) Shadow of death, darkness or gloom like that caused by the presence or the impending of death. Origin: Originally the same word as shade. See Shade. 1. To cut off light from; to put in shade; to shade; to throw a shadow upon; to overspead with obscurity. "The warlike elf much wondered at this tree, So fair and great, that shadowed all the ground." (Spenser) 2. To conceal; to hide; to screen. "Let every soldier hew him down a bough. And bear't before him; thereby shall we shadow The numbers of our host." (Shak) 3. To protect; to shelter from danger; to shroud. "Shadoving their right under your wings of war." (Shak) 4. To mark with gradations of light or colour; to shade. 5. To represent faintly or imperfectly; to adumbrate; hence, to represent typically. "Augustus is shadowed in the person of neas." (Dryden) 6. To cloud; to darken; to cast a gloom over. "The shadowed livery of the burnished sun." (Shak) "Why sad? I must not see the face O love thus shadowed." (Beau & Fl) 7. To attend as closely as a shadow; to follow and watch closely, especially in a secret or unobserved manner; as, a detective shadows a criminal. Origin: OE. Shadowen, AS. Sceadwian. See adow. Source: Websters Dictionary (01 Mar 1998) |
| shadow-casting | Deposition of a film of carbon or certain metals such as palladium, platinum, or chromium on a contoured microscopic object in order to allow the object to be seen in relief with the electron microscope or sometimes with the light microscope. (05 Mar 2000) |
| shadow-cast replica | <microscopy> A replica which has been shadowed. See: shadowing. (05 Aug 1998) |
| shadow cells | Immature leukocytes of any type that have undergone partial breakdown during preparation of a stained smear or tissue section, because of their greater fragility; smudge cell's are seen in largest numbers in chronic lymphocytic leukaemia. Synonym: basket cell, Gumprecht's shadows, shadow cells. (05 Mar 2000) |
| shadow corpuscle | A hypochromic, crescent-shaped erythrocyte, probably resulting from artifactual rupture of a red cell with loss of haemoglobin. Synonym: achromacyte, achromatocyte, ghost corpuscle, phantom corpuscle, Ponfick's shadow, shadow corpuscle, shadow, Traube's corpuscle. Origin: G. A-priv. + chroma, colour, + kytos, hollow (cell) (05 Mar 2000) |
| shadow mask | <microscopy> Also Aperture mask. In colour video monitors, a finely perforated or striped metal plate that is located between the three electron guns and the phosphor screen. The mask ensures that the electron beams carrying the R, G, and B signals land on the corresponding phosphors at every point in the picture. (05 Aug 1998) |
| shadow nucleus | A nucleus that has lost its pigment and staining properties. (05 Mar 2000) |
| shadow test | <physiology> The study of the retina of the eye by means of the ophthalmoscope. Origin: Retina + -scopy. Source: Websters Dictionary (01 Mar 1998) |
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