olemus
(1a) väljaulatuv radiaalpiirkond antenni kiirgusdiagrammil
= a radially protruding part in an antenna's radiation pattern
https://en.wikipedia.org/wiki/Main_lobe

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(1b) siseelundiosa
Wiktionary:
2. (anatomy) a clear division of an organ that can be determined at the gross anatomy level, especially one of the parts of the brain, liver or lung
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