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semi-ring
semi-ring n. 
/ˈsɛmiˌrɪŋ/ a band, etc. roughly semicircular or extending halfway round a part or an organ.
Brit. /ˈsɛmɪrɪŋ/
, /ˈsɛmɪrɪŋ/U.S. /ˈsɛˌmaɪˌrɪŋ/
, /ˈsɛˌmaɪˌrɪŋ//ˈsɛmiˌrɪŋ/ΚΠ
1841 H. Miller Old Red Sandstone (1887) vii. 134 This huge semi-ring of fossiliferous clays.
1896 A. Newton et al. Dict. Birds: Pt. IV iv. 941 The first and second bronchial semirings.
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