0 present participle of stumble --
1 to step awkwardly while walking or running and fall or begin to fall: --
2 to make a mistake, such as repeating something or pausing for too long, while speaking or playing a piece of music: --
The stumbling block came in identifying where a homologue of the medial pronucleus derivatives, including the olfactory-recipient mediodorsal nucleus, was located in amphibians.
We are stumbling toward it now and afraid to embrace it.
We are stumbling into learning how cities should best be made and managed.
Their stumbling block, however, was the lack of a well-thought-out ideal of completeness in their contemporary theory of science.
The stumbling block for many of our commentators was the lack of a "mechanism" in our theory.
The performer may thus read this part without stumbling over changes in modus or dots that could be misinterpreted.
But beyond these details there was one overall stumbling block.
The steps are shorter and faster, and the motion looks like the model is stumbling forward.
