pole (redirected from Polewards)

pole (pōl)

1. either extremity of any axis, as of the fetal ellipse or a body organ.

2. either one of two points which have opposite physical qualities.po´lar

---

animal pole 

1. the site of an oocyte to which the nucleus is approximated, and from which the polar bodies pinch off.

2. in nonmammalian species, the pole of an egg less heavily laden with yolk than the vegetal pole and exhibiting faster cell division.

cephalic pole  the end of the fetal ellipse at which the head of the fetus is situated.

frontal pole of cerebral hemisphere  the most prominent part of the anterior end of each hemisphere.

germinal pole  animal p.

occipital pole of cerebral hemisphere  the posterior end of the occipital lobe.

pelvic pole  the end of the fetal ellipse at which the breech of the fetus is situated.

temporal pole of cerebral hemisphere  the prominent anterior end of the temporal lobe.

vegetal pole  that pole of an oocyte at which the greater amount of food yolk is deposited.

---

pole (pl)

n.

1. Either of the two points at the extremities of the axis of an organ or body.

2. Either extremity of an axis through a sphere.

3. Either of two oppositely charged terminals, as in an electric cell.

---

pole

Etymology: L, polus

1 (in biology) an end of an imaginary axis drawn through the symmetrically arranged parts of a cell, organ, ovum, or nucleus.

2 one of a pair of opposite forces or attractants, as in magnetism or electricity.

3 (in anatomy) the point on a nerve cell at which a dendrite originates. polar, adj.

---

pole

1. either extremity of any axis, as of a body organ.

2. either one of two points that have opposite physical qualities (electric or other).

---

control pole

a pole with a loop at one end for capturing wild or dangerous small animals. The loop is put over the animal's head and pulled tight. Good poles have a nonslip device so that the animal cannot slip free because of relaxation on the cord by the operator.

frontal pole

the most prominent part of the anterior end of each hemisphere of the brain.

occipital pole

the posterior end of the occipital lobe of the brain.

temporal pole

the prominent anterior end of the temporal lobe of the human brain.