Webster's 1828 Dictionary
PROPOLIS
n.[Gr. before the city, or the front of the city. ] A thick odorous substance having some resemblance to wax and smelling like storax; used by bees to stop the holes and crevices in their hives to prevent the entrance of cold air, etc. Pliny represents it as the third coat; the first he calls commosis; the second pissoceros; the third, more solid than the others, he calls propolis.
This account of the propolis may not be perfectly correct, as authors do not agree in their descriptions of it.
Webster's 1913 Dictionary
PROPOLIS
Pro "po *lis, n. Etym: [L., fr. Gr.
Defn: Same as Bee glue, under Bee.
New American Oxford Dictionary
propolis
prop o lis |ˈpräpələs ˈprɑpələs | ▶noun a red or brown resinous substance collected by honeybees from tree buds, used by them to fill crevices and to seal and varnish honeycombs. ORIGIN early 17th cent.: via Latin from Greek propolis ‘suburb, ’ also ‘bee glue, ’ from pro ‘before ’ + polis ‘city. ’
Oxford Dictionary
propolis
propolis |ˈprɒp (ə )lɪs | ▶noun [ mass noun ] a red or brown resinous substance collected by honeybees from tree buds, used by them to fill crevices and to fix and varnish honeycombs. ORIGIN early 17th cent.: via Latin from Greek propolis ‘suburb ’, also ‘bee glue ’, from pro ‘before ’ + polis ‘city ’.
Duden Dictionary
Propolis
Pro po lis Substantiv, feminin , die |Pr o polis |die Propolis; Genitiv: der Propolis griechisch ; »Vorstadt «harzartige, keimfreie Masse, die Bienen von den Knospen der Laubbäume sammeln, um damit das Innere ihres Bienenstocks auszukleiden