### `++limb`

    ++  limb  $|(term $%([%& p=axis] [%| p=@ud q=term]))    ::

XX move to `++ut`

Reference into subject by name/axis

See also: section 2fC-2fD

    ~zod/try=> (ream '^^$')
    [%cnzz p=~[[%.n p=2 q=%$]]]
    ~zod/try=> (limb &2:(ream '^^$'))
    [%.n p=2 q=%$]
    ~zod/try=> (limb &2:(ream '^^^$'))
    [%.n p=3 q=%$]



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