< /ˌdaɪ əˈsti mə tə/.

  1. Cell Biology. the modified protoplasm at the equator of a cell, existing before mitotic division.
  2. Dentistry. a space between two teeth, especially a space between a canine and an incisor of the upper jaw into which a lower canine occludes.

noun plural -mata (-mətə)

  1. an abnormal space, fissure, or cleft in a bodily organ or part
  2. a gap between the teeth

n. pl. di•a•ste•ma•ta (-mə-tə)

  1. A fissure or abnormal opening in a part, especially when congenital.
  2. A gap or space between two adjacent teeth in the same dental arch.
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