| neoplasms, second primary | Abnormal growths of tissue that follow a previous neoplasm but are not metastases of the latter. The second neoplasm may have the same or different histological type and can occur in the same or different organs as the previous neoplasm but in all cases arises from an independent oncogenic event. The development of the second neoplasm may or may not be related to the treatment for the previous neoplasm since genetic risk or predisposing factors may actually be the cause. (12 Dec 1998) |
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| error of the second kind | See: Error, beta. (12 Dec 1998) |
| twelfth-second | <physics> A unit for the measurement of small intervals of time, such that 10^12 (ten trillion) of these units make one second. Source: Websters Dictionary (01 Mar 1998) |
| foot-pound-second | <unit> An absolute unit of the foot-pound-second system. (05 Mar 2000) |
| foot-pound-second system | <mechanics> A system of absolute units based on the foot, pound, and second. (05 Mar 2000) |