Can a compound with indirectly bonded carbon and silicon atoms within the same aromatic system be called organosilicon compound? Wikipedia says that organosilicon compounds are organic compounds with carbon-silicon bonds.

Does the class of organosilicon compounds include compounds in which the carbon and silicon are only indirectly bonded, for example the (hypothetical) molecule 1,3,5-trihydroxy-4,6-dioxa-2-lambda3-oxa-3,5-disilacyclohex-1-ene(3+), in which the carbon and silicon atoms are not formally directly bonded but are part of the same aromatic (six π-electrons) ring, sharing the same aromatic bonding orbitals?

Here's what the molecule looks like (direct uploadd won't work for some reason...)
Organosilicon compounds fall under the broader category of Organometallic compounds. It is a requirement that in organometallic compounds, atleast one $\ce{C-M}$ bond should exist. Since Si is only bonded to oxygen atoms in your compound, the given compound is not an organosilicon compound.

The following is also mentioned in the wikipedia page for Organosilicon compounds, under the image:


  A carbon–silicon bond present in all organosilicon compounds