1. SYN: nucleiform. 2. A nuclear inclusion body. 3. SYN: nucleus (2). [nucleo- + G. eidos, resemblance]
- Lavdovsky n. SYN: astrosphere.
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nucleoid n the DNA-containing area of a prokaryotic cell (as a bacterium)
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nu·cle·oid (nooґkle-oid) 1. resembling a nucleus. 2. a DNA-containing region lacking a surrounding nuclear membrane, occurring in prokaryotes, mitochondria, and chloroplasts; it is analagous to the eukaryotic cell nucleus. 3. the core of nucleic acid surrounded by the protein capsid in some viruses.Medical dictionary. 2011.