حَدَأَةٌ
1.
(As, S, K) and
حِدَأَةٌ, but the former is the more chaste, (TA,) A double-headed
فَأْس [i. e. hoe, or adz, or axe]: (As, S, K:) [a kind of فَأْس used in the present day is a hoe with two heads, one at each end of the handle:] or the head of a
فَأْس: and the head of an arrow: (K:) plural of the former
حَدَأٌ (As, S, K) [or rather this is a coll. gen. n.] and حِدَاءٌ, (K, TA, [in the CK حَداءٌ,]) mentioned by AO and As and A 'Obeyd; (TA;) and the plural of حِدَأَةٌ is
حِدَأٌ (TA) [or rather this, like حَدَأٌ, is a coll. gen. n.].
2.
See also the next paragraph, in two places.