| expand | To become widely opened, spread apart, dilated, distended, or enlarged; as, flowers expand in the spring; metals expand by heat; the heart expands with joy. 1. To lay open by extending; to open wide; to spread out; to diffuse; as, a flower expands its leaves. "Then with expanded wings he steers his flight." (Milton) 2. To cause the particles or parts of to spread themselves or stand apart, thus increasing bulk without addition of substance; to make to occupy more space; to dilate; to distend; to extend every way; to enlarge; opposed to contract; as, to expand the chest; heat expands all bodies; to expand the sphere of benevolence. 3. <mathematics> To state in enlarged form; to develop; as, to expand an equation. See Expansion. Origin: L. Expandere, expansum; ex out + pandere to spread out, to throw open; perh. Akin to E. Patent. Cf. Spawn. Source: Websters Dictionary (01 Mar 1998) |
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| expanded access | Refers to any of the FDA procedures (compassionate use, parallel track and treatment IND see) that distributes experimental drugs to patients who are failing on currently available treatments for their condition and also are unable to participate in ongoing clinical trials. (09 Oct 1997) |
| expander | Anything which causes expansion especially. <mechanics> A tool for stretching open or expanding a tube, etc. Source: Websters Dictionary (01 Mar 1998) |
| expanding | That expands, or may be expanded; extending; spreading; enlarging. Expanding bit, Expanding drill, a pulley so made, as in sections, that its diameter can be increased or diminished. Source: Websters Dictionary (01 Mar 1998) |