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hepta-compound
hepta-compound n.
Brit. 
/ˈhɛptəˌkɒmpaʊnd/
, /ˈhɛptəˌkɒmpaʊnd/U.S. /ˈhɛptəˌkɑmpaʊn(d)/
Chemistry a compound containing seven atoms of any element or radical; esp. a heptacarbon compound./ˈhɛptəˌkɑmpaʊn(d)/ΚΠ
1866 W. Odling Lect. Animal Chem. 66 Heptacompounds, including oil of bitter almonds, and the benzoic, salicic, and gallic acids.
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