[ahy-suh-pik-nik] /ˌaɪ səˈpɪk nɪk/
[ahy-suh-pik-nl] /ˌaɪ səˈpɪk nl/ (Show IPA). having the same density.
a line drawn on a map connecting all points having the same density, as of water or air.
[ahy-suh-pahyuh r] /ˈaɪ səˌpaɪər/ noun, Mineralogy. 1. an impure variety of opal, containing alumina, lime, and iron sesquioxide.
- Iso rating
noun 1. (photog) a classification of film speed in which a doubling of the ISO number represents a doubling in sensitivity; for example, ISO 400 film requires half the exposure of ISO 200 under the same conditions. The system uses identical numbers to the obsolete ASA rating
[ahy-soh-reel] /ˈaɪ soʊˌril/ noun, Television. 1. the exposed film of one or more isolated cameras that is ready for editing.
[ahy-suh-rith-uh m] /ˈaɪ səˌrɪð əm/ noun, Music. 1. a structural feature characteristic of the Ars Nova motet, consisting of a single rhythmic phrase pattern repeated, usually in the tenor, throughout the composition.