| polar mutation | <molecular biology> A mutation in a single gene which affects the rate of expression of other genes that are near it on a chromosome. (09 Oct 1997) |
|---|---|
| polar plasm | <cell biology, embryology> Differentiated cytoplasm associated with the animal or vegetal pole of an oocyte, egg or early embryo. (18 Nov 1997) |
| polar plates | Condensed platelike bodies at the ends of the spindle during mitosis of certain types of cells. (05 Mar 2000) |
| polar presentation | The presentation of either pole of the foetal oval; may be either a cephalic or breech presentation, or a longitudinal lie. (05 Mar 2000) |
| polar ring | A thickened, electron-dense ring at the anterior end of certain stages of the Apicomplexa; part of the apical complex characteristic of these sporozoans. (05 Mar 2000) |
| polar solvents | Solvent's that exhibit polar forces on solutes, due to high dipole moment, wide separation of charges, or tight association; e.g., water, alcohols, acids. (05 Mar 2000) |
| polar star | One of the figures forming the diaster. Synonym: polar star. (05 Mar 2000) |
| polar zone | The region in the vicinity of an electrode applied to the body. See: electrotonus. (05 Mar 2000) |
| polarchy | See Polyarchy. Source: Websters Dictionary (01 Mar 1998) |
| polaric | See Polar. Source: Websters Dictionary (01 Mar 1998) |
| polarily | In a polary manner; with polarity. Source: Websters Dictionary (01 Mar 1998) |
| polarimeter | <optics> An instrument for determining the amount of polarization of light, or the proportion of polarized light, in a partially polarized ray. Origin: Polar. Source: Websters Dictionary (01 Mar 1998) |
| polarimetry | <optics> The art or process of measuring the polarization of light. Source: Websters Dictionary (01 Mar 1998) |
| polaris | <astronomy> The polestar. See North star, under North. Origin: NL. See Polar. Source: Websters Dictionary (01 Mar 1998) |
| polariscope | <instrument, optics> An instrument consisting essentially of a polarizer and an analyzer, used for polarizing light, and analyzing its properties. (28 Oct 1998) |