lanthanide series: the rare-earth elements with atomic numbers 57 through 71; having properties similar to lanthanum
series: similar things placed in order or happening one after another
infliximab: an anti-TNF compound (trade name Remicade) consisting of an antibody directed against TNF; it is given intravenously at one-month to three-month intervals; used in treatment of regional enteritis and rheumatoid arthritis