NCIt definition : A semi-solid composed of a solid, three dimensional, cross linked matrix of polymers
within a liquid, yielding a jelly-like material unable to flow at steady state.;
Alternative definition : CDISC: A semisolid (1) dosage form that contains a gelling agent to provide stiffness
to a solution or a colloidal dispersion (2). A gel may contain suspended particles.
Note 1: A semisolid is not pourable; it does not flow or conform to its container
at room temperature. It does not flow at low shear stress and generally exhibits plastic
flow behavior. Note 2: A colloidal dispersion is a system in which particles of colloidal
dimension (i.e., typically between 1 nm and 1 micrometer) are distributed uniformly
throughout a liquid.; EDQM-HC: Semi-solid single-dose or multidose preparation consisting of a single-phase
basis of liquids gelled by a suitable gelling agent, intended for cutaneous use. Active
substance(s) are dissolved or dispersed in the basis, which may be hydrophilic or
hydrophobic.;