— sill-like , adj.
/sil/ , n.
1. a horizontal timber, block, or the like serving as a foundation of a wall, house, etc.
2. the horizontal piece or member beneath a window, door, or other opening. See diag. under double-hung .
3. Geol. a tabular body of intrusive igneous rock, ordinarily between beds of sedimentary rocks or layers of volcanic ejecta.
[ bef. 900; ME sille, OE syl, sylle; c. LG süll, ON syll; akin to G Schwelle sill ]