The term 'less negligible' is correct and usable in written English.
You can use it to compare two similar concepts by expressing that one is of less importance than the other. For example, "The consequences of not following safety protocols was less negligible than those of not reporting the accident to the authorities."
The impact on his image might be less negligible.
"It's true that our influence is more or less negligible but nowadays there is no Israeli who does not at least know the word Nakba.
As a work of literature it's more or less negligible, although the workmanlike prose is enlivened with zesty infusions of gum-chewing New York humor.
Importance of all other combinations was more or less negligible.
Based on his analysis, hormesis has not made a substantial contribution to the field and, as a concept, is now only less negligible than it was 15 years ago.
One point to be noted is that we ignore the overhead effect in this paper because the data is less and negligible.
It can be observed from Figure14b that 90% of the correlation coefficients for the measured symmetric links are larger than 0.3, while the correlation coefficients of all links are much less and negligible.
Immersion in both media leads to the pronounced degradation in the resin controlled property (i.e., short beam shear strength) of CFRP, but shows less or negligible effects on the fiber controlled properties (i.e., tensile strength and modulus).
In contrast, the errors exhibit much less (statistically negligible) serial correlation in the bottom middle plot.
Recent researches have revealed that herbal products have better antifungal efficacy and less or negligible undesirable effects on human beings as compared to chemotherapeutic agents [ 14].
For mature ribosomes, however, r-proteins are fully modified and the errors and variability due to PTMs are less or negligible.
