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subtransmission
subtransmission n. 
/ˈsʌbtrɑːnzˌmɪʃn/, /ˌsʌbtranzˈmɪʃn/, /ˌsʌbtrɑːnzˈmɪʃn/, /ˈsəbˌtræn(t)sˌmɪʃ(ə)n/, /ˌsəbˌtrænzˈmɪʃ(ə)n/, /ˌsəbˌtræn(t)sˈmɪʃ(ə)n/
Brit. /ˈsʌbtranzˌmɪʃn/
, /ˈsʌbtranzˌmɪʃn//ˈsʌbtrɑːnzˌmɪʃn//ˌsʌbtranzˈmɪʃn//ˌsʌbtrɑːnzˈmɪʃn/U.S. /ˈsəbˌtrænzˌmɪʃ(ə)n/
, /ˈsəbˌtrænzˌmɪʃ(ə)n//ˈsəbˌtræn(t)sˌmɪʃ(ə)n//ˌsəbˌtrænzˈmɪʃ(ə)n//ˌsəbˌtræn(t)sˈmɪʃ(ə)n/ΚΠ
1897 L. Bell Electric Power Transmission ix. 349 For reaching neighboring towns, three 40 KW transformers feed a 3000 volt sub-transmission system.
1900 Cent. Mag. 59 493/2 The minister of the interior..whose touches thrill by devolution and subtransmission throughout the mighty system.
2002 A. Lovins Small is Profitable 243/2 The distribution system typically has a radial architecture, a ‘tree’ that branches from the highest-voltage to successively smaller subtransmission lines.
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