The adoration of the host or the bread consecrated in the Eucharist.
The practice has been regarded as idolatrous by those who do not believe in the real presence of the body of Christ in the Blessed Sacrament..
Origin
Early 17th century; earliest use found in Martin Fotherby (c1560–1620), bishop of Salisbury. From post-classical Latin artolatria from ancient Greek ἀρτο-, combining form of ἄρτος bread + post-classical Latin -latria.