| CDC | calculated date of confinement; cancer diagnosis center; capillary diffusion capacity; cell division... |
|---|---|
| DC | daily census; data communication; data conversion; decrease; deep compartment; Dental Corps; deoxych... |
| DD | dangerous drug; data definition; day of delivery; degenerated disc; degenerative disease; delusional... |
| DIFF, diff | difference, differential; diffusion |
| DL | danger list; De Lee [catheter]; deep lobe; developmental level; difference limen; diffusion lung [ca... |
| ark shell | <zoology> A marine bivalve shell belonging to the genus Arca and its allies. Source: Websters Dictionary (01 Mar 1998) |
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| boat shell | <zoology> A marine gastropod of the genus Crepidula. The species are numerous. It is so named from its form and interior deck. A marine univalve shell of the genus Cymba. Source: Websters Dictionary (01 Mar 1998) |
| bubble shell | <zoology> A marine univalve shell of the genus Bulla and allied genera, belonging to the Tectibranchiata. Source: Websters Dictionary (01 Mar 1998) |
| maara shell | <zoology> A large, pearly, spiral, marine shell (Turbo margaritaceus), from the Pacific Islands. It is used as an ornament. Source: Websters Dictionary (01 Mar 1998) |
| valve-shell | <zoology> Any fresh water gastropod of the genus Valvata. Source: Websters Dictionary (01 Mar 1998) |
| mail-shell | <zoology> A chiton. Source: Websters Dictionary (01 Mar 1998) |
| mask shell | <zoology> Any spiral marine shell of the genus Persona, having a curiously twisted aperture. Source: Websters Dictionary (01 Mar 1998) |
| goroon shell | <zoology> A large, handsome, marine, univalve shell (Triton femorale). Source: Websters Dictionary (01 Mar 1998) |
| rice-shell | <zoology> Any one of numerous species of small white polished marine shells of the genus Olivella. Source: Websters Dictionary (01 Mar 1998) |
| wedge-shell | <zoology> Any one of numerous species of small marine bivalves belonging to Donax and allied genera in which the shell is wedge-shaped. Source: Websters Dictionary (01 Mar 1998) |
| wing-shell | <zoology> Any one of various species of marine bivalve shells belonging to the genus Avicula, in which the hinge border projects like a wing. Any marine gastropod shell of the genus Strombus. See Strombus. Any pteropod shell. Source: Websters Dictionary (01 Mar 1998) |
| worm-shell | <zoology> Any species of Vermetus. Source: Websters Dictionary (01 Mar 1998) |
| wreath-shell | <zoology> A marine shell of the genus Turbo. See Turbo. Source: Websters Dictionary (01 Mar 1998) |
| pouch-shell | <zoology> A small British and American pond snail (Bulinus hypnorum). Source: Websters Dictionary (01 Mar 1998) |
| cytotrophoblastic shell | The external layer of foetally derived trophoblastic cells on the maternal surface of the placenta. (05 Mar 2000) |