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submarginal

sub·mar·gin·al

submarginal

 
pronunciation:
suhb mar jih nl
part of speech: adjective
definition 1: below the minimum requirement; unacceptable; substandard.
submarginal conditions in sanitation and housing
definition 2: not yielding a satisfactory return; infertile or unproductive.
submarginal soil
definition 3: near the margin of a body part or organ.
derivation: submarginally (adv.)