prorubricyte

erythroblast

 [ĕ-rith´ro-blast]

a term originally used for any type of nucleated erythrocyte, but now usually limited to one of the nucleated precursors of an erythrocyte, i.e. one of the developmental stages in the erythrocytic series, in contrast to a megaloblast. In this usage, it is called also normoblast.

basophilic erythroblast a nucleated precursor in the erythrocytic series, preceding the polychromatophilic erythroblast and following the proerythroblast; the cytoplasm is basophilic, the nucleus is large with clumped chromatin, and the nucleoli have disappeared. Called also basophilic normoblast.

orthochromatic erythroblast see normoblast.

polychromatic erythroblast (polychromatophilic erythroblast) see normoblast.

Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

pro·ru·bri·cyte

(prō-rū'bri-sīt),

Basophilic normoblast. See: erythroblast.

[pro- + rubricyte]

Farlex Partner Medical Dictionary © Farlex 2012

basophilic normoblast

A cell that is smaller (l0 to 17 µm in diameter) than a pronormoblast but similar in cellular and nuclear shape.

The chromatin is somewhat condensed; the nuclei of large or early basophilic normoblasts may reveal single nucleoli, but those of small or late basophilic normoblasts lack nucleoli; a perinuclear halo is often visible. the cytoplasm is greater in amount than in the pronormoblasts, surrounds the nucleus and is uniformly deep blue; the N:C ratio is ± 6:1.

Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

pro·ru·bri·cyte

(prō-rū'bri-sīt)

Basophilic normoblast.
See also: erythroblast

[pro- + rubricyte]

Medical Dictionary for the Health Professions and Nursing © Farlex 2012