| trough-shell | <zoology> Any bivalve shell of the genus Mactra. See Mactra. Source: Websters Dictionary (01 Mar 1998) |
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| tube-shell | <zoology> Any bivalve mollusk which secretes a shelly tube around its siphon, as the watering-shell. Source: Websters Dictionary (01 Mar 1998) |
| tulip-shell | <zoology> A large, handsomely coloured, marine univalve shell (Fasciolaria tulipa) native of the Southern United States. The name is sometimes applied also to other species of Fasciolaria. Source: Websters Dictionary (01 Mar 1998) |
| turban-shell | <zoology> A sea urchin when deprived of its spines; popularly so called from a fancied resemblance to a turban. Source: Websters Dictionary (01 Mar 1998) |
| turnip-shell | <zoology> Any one of several large, thick, spiral marine shells belonging to Rapa and allied genera, somewhat turnip-shaped. Source: Websters Dictionary (01 Mar 1998) |
| tusk-shell | <zoology> See Tusk. Source: Websters Dictionary (01 Mar 1998) |
| K shell | The innermost electron orbit or shell; it can hold two electrons. (05 Mar 2000) |
| fig-shell | <zoology> A marine univalve shell of the genus Pyrula, or Ficula, resembling a fig in form. Source: Websters Dictionary (01 Mar 1998) |
| CS2 secondary alkylsulfohydrolase | <enzyme> From comamonas terrigena Registry number: EC 3.1.6.- Synonym: cs2 sa sulfohydrolase (26 Jun 1999) |
| protein structure, secondary | The stage in the development of protein structure in which regular hydrogen-bond interactions within contiguous stretches of polypeptide chain give rise to alpha helices and beta sheets. This is the first folding level of protein building. (12 Dec 1998) |
| secondary | Second or inferior in order of time, place or importance, derived from or consequent to a primary event or thing. Origin: L. Secundarius, secundus = second (18 Nov 1997) |
| secondary abdominal pregnancy | A condition in which the embryo or foetus continues to grow in the abdominal cavity after its expulsion from the fallopian tube or other seat of its primary development. Synonym: abdominocyesis. (05 Mar 2000) |
| secondary adhesion | Delayed closure of two granulating surfaces. Synonym: secondary adhesion, secondary union. (05 Mar 2000) |
| secondary adrenocortical insufficiency | Adrenocortical insufficiency caused by failure of ACTH secretion resulting from anterior pituitary disease or inhibition of ACTH production resulting from exogenous steroid therapy. (05 Mar 2000) |
| secondary aerodontalgia | Pain referred to the dental area from an area of aerosinusitis. (05 Mar 2000) |