قثد1 قَثَدَ, aor. ـِ (TK,) inf. n. قَثْدٌ, (K,) He ate the [plant, or vegetable, called] قَثَدٌ. (K.) 8 اقتثد He cut (L, K) as one cuts the قثد. (L.) قَثَدٌ [a coll. gen. n.] A certain plant resembling the قِثَّآء [a kind of cucumber]: (S, L, K:) or a species of the قثّآء: (L, K:) or the round قثّآء: (IDrd, L:) or the خِيار: (L, K:) or the خيار باذرنق [Persian بَادْ رَنْكْ]: (T, L:) n. un. with ة. (L, K.)