a paprika from Spain's western region of Extremadura, from dried, smoked, and smoothly ground mature red peppers

(chemistry) a laboratory designed for use with radioactive substances

A mountain pass between India and China.

(US), (Canada) The holiday marking the unofficial end of summer, held on the first Monday in September. / An annual holiday held on May 1 to celebrate the economic and social achievements of workers.

(physics, chemistry) An organic compound, containing an unpaired electron spin, that can be bonded to a molecule under investigation so as to be analysed using electron spin resonance spectroscopy

(sometimes attributive) A sustained sea-surface temperature anomaly of magnitude greater than 0.5°C across the central tropical Pacific Ocean, associated with a negative anomaly and producing predictable variations in local and regional weather patterns.

Nonstandard spelling of La Niña.

(chemistry, physics) A chip, combining semiconductor and microfluidics technologies, capable of handling and analyzing very small quantities of sample, especially of bodily fluids for medical purposes.

(US) Alternative spelling of labour force

(American spelling) Work done by hand or using basic tools rather than by machines; usually physically demanding but (sometimes derogatory) unskilled labor.