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clone

1. n. an organism that is genetically identical to another, whether because both organisms originate from a single common parent as a result of asexual reproduction or because one is derived from genetic material taken from the other, as in reproductive cloning. Differences in characters between cloned individuals are assumed to be the result of environmental factors.

2. n. a group of genetically identical organisms.

3. n. a group of cells derived from a single parent cell.

4. vb. to produce genetically identical copies of a particular organism or cell. —clonal adj.

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Psychology term of the day

March 16th 2025

imipramine

imipramine

n. a tricyclic antidepressant (TCA) with a tertiary amine molecular structure. It was originally synthesized in the hope of creating an effective antipsychotic but was observed to be ineffective in reducing psychotic symptoms. It did, however, seem to help individuals with severe depression and was subsequently marketed as an antidepressant. It is considered the prototype TCA, and like all tricyclic agents, its use as an antidepressant has been largely supplanted by less toxic drugs. It retains a therapeutic role as a sedative and adjunct in the management of neuromuscular or musculoskeletal pain. U.S. trade name: Tofranil.