re-agent(s) to reagent(s)
omphalo-meseraic to omphalomeseraic
pleuroperitoneal to pleuro-peritoneal
proto-vertebra(æ) to protovertebra(æ)
re-appear to reappear
semi-lunar to semilunar
side-fold to side fold
spongework to sponge-work
subgerminal to sub-germinal
sub-intestinal to subintestinal