P-Iodophenylsulfonyl, the radical of pipsyl chloride that combines with the amino groups of amino acids and proteins. ... (05 Mar 2000) ... 
(Ips) Type: Term Pronunciation: pip′sil Definitions: 1. p-Iodophenylsulfonyl, the radical of pipsyl chloride that combines with the amino groups of amino acids and proteins.