| two-step procedure | <surgery> When surgical biopsy and breast surgery are performed in two separate surgeries. (09 Oct 1997) |
|---|---|
| unimolecular step | <chemistry> A reaction involving one species (09 Jan 1998) |
| lock step | A mode of marching by a body of men going one after another as closely as possible, in which the leg of each moves at the same time with the corresponding leg of the person before him. Source: Websters Dictionary (01 Mar 1998) |