any of the small pearls produced especially by freshwater mussels.
noun a female first-year student in high school, college, or university Usage Note pl freshwomen
[fruh-nel, French frey-nel] /frəˈnɛl, French freɪˈnɛl/ noun 1. a unit of frequency, equal to 10 12 cycles per second. [fruh-nel; French frey-nel] /frəˈnɛl; French freɪˈnɛl/ noun 1. Augustin Jean, 1788–1827, French physicist. /ˈfreɪnɛl; French frɛnɛl/ noun 1. a unit of frequency equivalent to 1012 hertz /French frɛnɛl/ noun 1. Augustin Jean (oɡystɛ̃ ʒɑ̃). 1788–1827, French […]
noun, Optics. 1. .
noun 1. Optics. a large lens with a surface of concentric grooves of prismatic profile, used in automobile headlights, searchlights, spotlights, etc. noun 1. a lens consisting of a number of smaller lenses arranged to give a flat surface of short focal length Fresnel lens (frə-něl’) A thin optical lens consisting of concentric rings of […]