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semi-armour- piercing
semi-armour- piercing n. 
/ˌsɛmiˈɑrmər ˌpɪrsɪŋ/ applied to a kind of shell for perforating some thickness of armour plate.
Brit. /ˌsɛmɪˈɑːmə ˌpɪəsɪŋ/
, /ˌsɛmɪˈɑːmə ˌpɪəsɪŋ/U.S. /ˌsɛˌmaɪˈɑrmər ˌpɪrsɪŋ/
, /ˌsɛˌmaɪˈɑrmər ˌpɪrsɪŋ//ˌsɛmiˈɑrmər ˌpɪrsɪŋ/ΚΠ
1898 Westm. Gaz. 9 June 5/1 Semi-armour piercing shell and other ammunition.
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