| polyblast | One of a group of ameboid, mononucleated, wandering phagocytic cells found in inflammatory exudates. Origin: poly-+ G. Blastos, germ (05 Mar 2000) |
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| polyblennia | Excessive production of mucus. Origin: poly-+ G. Blennos, mucus (05 Mar 2000) |
| polybranchia | <zoology> A division of Nudibranchiata including those which have numerous branchiae on the back. Origin: NL. See Poly-, and Branchia. Source: Websters Dictionary (01 Mar 1998) |
| polybromide | <chemistry> A bromide containing more than one atom of bromine in the molecule. Origin: Poly- + bromide. Source: Websters Dictionary (01 Mar 1998) |
| polybrominated biphenyls | Biphenyl compounds which are extensively brominated. Many of these compounds are toxic environmental pollutants. (12 Dec 1998) |
| polycarbophil | A polyacrylic acid cross-linked with divinyl glycol; used as a gastrointestinal absorbent. (05 Mar 2000) |
| polycarboxylate cement | Water-soluble low-molecular-weight polymers of acrylic or methacrylic acid that form solid, insoluble products when mixed with specially prepared zno powder. The resulting cement adheres to dental enamel and is also used as a luting agent. (12 Dec 1998) |
| polycardia | <clinical sign> The excessive rapidity in the action of the heart, the term is usually applied to a heart rate above 100 per minute and may be qualified as atrial, junctional (nodal) or ventricular and as paroxysmal. Origin: Gr. Kardia = heart (18 Nov 1997) |
| polycarpellary | <botany> Composed of several or numerous carpels; said of such fruits as the orange. Source: Websters Dictionary (01 Mar 1998) |
| polycarpous | <botany> Bearing fruit repeatedly, or year after year. Having several pistils in one flower. Origin: Poly- + Gr. Fruit. Source: Websters Dictionary (01 Mar 1998) |
| polycation | <biochemistry, chemistry> Macromolecule with many positively charged groups. at physiological pH the most commonly used in cell biology is poly L lysine, this is often used to coat surfaces thereby increasing the adhesion of cells (which have net negative surface charge). See: cationised ferritin. (18 Nov 1997) |
| polycentric | Having several centres. (05 Mar 2000) |
| polychaeta | <zoology> One of the two principal groups of Chaetopoda. It includes those that have prominent parapodia and fascicles of setae. Origin: NL, from Gr. Many + hair. Source: Websters Dictionary (01 Mar 1998) |
| polycheiria | Polychiria Presence of supernumerary hands. Origin: poly-+ G. Cheir, hand (05 Mar 2000) |
| polychloride | <chemistry> A chloride containing more than one atom of chlorine in the molecule. Origin: Poly- + chloride. Source: Websters Dictionary (01 Mar 1998) |