adscititious
/ˌadsɪˈtɪʃəs
/adjective archaic
Forming an addition or supplement; not integral.By the incorporation of these adscititious elements, such elements, at crucial moments, threaten to compromise the rhythmic integrity of entire pieces.
Origin
Early 17th century: from Latin adscit- 'admitted, adopted', from adsciscere, + -itious1, on the pattern of adventitious.