(mineralogy) A trigonal-rhombohedral black mineral containing iron, lead, manganese, oxygen, potassium, sodium, titanium, and zinc.

(number theory) The constant of proportionality (approximately 0.7642) in the relationship between the number of positive integers less than x that are the sum of two square numbers, for large x, and the expression x/√.

plural of landamman

A chief magistrate in some Swiss cantons. / The president of the diet of the Helvetic republic.

(medicine, neurology) A rare childhood neurological syndrome, characterized by the sudden or gradual development of aphasia and an abnormal electroencephalogram.

plural of landaulette

plural of Landammann

plural of Landammann

plural of Landau level

(physics) Any of the discrete energy values that represent the only cyclotron orbits that a charged particle can occupy in a magnetic field, as a result of Landau quantization.