deficient


Concise Oxford English Dictionary © 2008 Oxford University Press:
deficient /dɪˈfɪʃ(ə)nt/
adjective not having enough of a specified quality or ingredient: a diet deficient in vitamin B.

■ insufficient or inadequate.

– derivatives
deficiently adverb.
– origin C16: from L. deficient-, deficere (see defect1).
'deficient' also found in these Oxford entries:

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