| nucleoplasm | <cell biology> By analogy with cytoplasm, that part of the nuclear contents other than the nucleolus. (18 Nov 1997) |
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| filamentous | <cell biology> In the form of very long rods, many times longer than wide. (10 Mar 1998) |
| filamentous bacterial viruses | Deoxyribonucleoproteins that "infect" and replicate in Gram-negative bacteria having sex pili and that, unlike bacteriophage, are released from infected bacteria without damage to the cell; they seem to be of two kinds, one of which has a specificity for F pili and the other for I pili. Synonym: fibrous bacterial viruses. (05 Mar 2000) |
| filamentous bacteriophage | <molecular biology> A type of single-stranded DNA bacteriophage (virus which infects bacteria) that has a capsid which is long and thin, like a filament. Examples include the viruses F1 and M13. (10 Mar 1998) |
| filamentous colony | In bacteriology, a colony composed of long, interwoven, irregularly disposed threads. (05 Mar 2000) |