potent

Concise Oxford English Dictionary © 2008 Oxford University Press:
potent1

▶adjective

• 1 having great power, influence, or effect.

• 2 (of a male) able to achieve an erection or to reach an orgasm.

– derivatives
potence noun,
potency noun (pl. potencies),
potently adverb.

– origin ME: from L. potent-, posse ‘be powerful, be able’.

Concise Oxford English Dictionary © 2008 Oxford University Press:
potent2 Heraldry

▶adjective [postpos.]

• 1 formed of crutch-shaped pieces; (especially of a cross) having a straight bar across the end of each extremity.

• 2 of the fur called potent (as a tincture).

▶noun fur resembling vair, but with the alternating pieces T-shaped.

– origin ME: alt. of OFr. potence ‘crutch’, from L. potentia ‘power’ (in med. L. ‘crutch’), from potent- (see potent1).