释义 |
Brownian, a.|ˈbraʊnɪən| [f. the name of Dr. Robert Brown, who first described the movement in question.] Brownian movement: the irregular oscillatory movement observed in microscopic particles or ‘molecules’ of all kinds suspended in a limpid fluid; also called molecular movement.
1871Bastian Orig. Lowest Organisms 46 Bacteria..which exhibit movements resembling those known as Brownian. 1874Jones & Siev. Pathol. Anat. 28 Serum..crowded with fatty molecules, presenting an active Brownian movement. 1875Darwin Insectiv. Plants iii. 64 Small granules which exhibited Brownian movements. |