invagination (redirected from invaginations)

invagination /in·vag·i·na·tion/ (in-vaj″ĭ-na´shun)

1. the infolding of one part within another part of a structure, as of the blastula during gastrulation.

2. intussusception.

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basilar invagination  a developmental deformity of the occipital bone and upper end of the cervical spine in which the latter appears to have pushed the floor of the occipital bone upward.

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in·vag·i·na·tion (n-vj-nshn)

n.

1. The act or process of invaginating or the condition of being invaginated.

2. An invaginated organ or part.

3. The infolding of a portion of the outer layer of a blastula in the formation of a gastrula.

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invagination

[invaj′ənā′shən]

Etymology: L, in, within, vagina, sheath

1 a condition in which one part of a structure telescopes into another, as the intestine during peristalsis. If the invagination is extensive or involves a tumor or polyp, it may cause an intestinal obstruction, necessitating surgery.

2 surgery for repair of a hernia by replacement of the contents of the hernial sac in the abdominal cavity. General or spinal anesthesia may be used. See also hernia, intestinal obstruction, intussusception, peristalsis. invaginate, v.

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invagination

1. the infolding of one part within another part of a structure, as of the blastula during gastrulation.

2. intussusception.