Drusen, from the German word for node or geode (singular, ), are tiny yellow or white accumulations of extracellular material that build up between Bruch's membrane and the retinal pigment epithelium of the eye. The presence of a few small () drusen is normal with advancing age, and most people over 40 have some hard drusen.
(mineralogy) An inner surface with a crust of tiny crystals.
(botany) An aggregation of calcium oxalate crystals found in certain plants.
(ophthalmology) A tiny yellow or white accumulation of extracellular material that builds up in Bruch's membrane of the eye.
A cavity in a rock, having its interior surface studded with crystals and sometimes filled with water; a geode.
One of a people and religious sect dwelling chiefly in the Lebanon mountains of Syria.
‘The Druses separated from the Mohammedan Arabs in the 9th century. Their characteristic dogma is the unity of God.’;
an adherent of an esoteric monotheistic religious sect living in the relative security of the mountains of Syria and Lebanon who believes that Al-hakim was an incarnation of God;
‘a Druze is permitted to conform outwardly to the faith of the unbelievers among whom he lives’;