Hypertext Webster Gateway: "invisibly"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Invisibly \In*vis"i*bly\, adv.
In an invisible manner. --Denham.
From WordNet (r) 1.7 (wn)
invisibly
adv : without being seen; "these organisms enter the body
invisibly" [ant: {visibly}]
Additional Hypertext Webster Gateway Lookup
Gateway by dict@stokkie.net
stock only wrote the gateway and does not have any control over the contents;
see the Webster Gateway FAQ,
and also the Back-end/database links and credits.