The Collaborative International Dictionary of English v.0.48:

Lineage \Lin"e*age\ (l[i^]n"[-e]*[asl]j; 48), n. [OE. linage, F.
   lignage, fr. L. linea line. See 3d Line.]
   Descent in a line from a common progenitor; progeny; race;
   descending line of offspring or ascending line of parentage.
   [1913 Webster]

         Both the lineage and the certain sire
         From which I sprung, from me are hidden yet. --Spenser.
   [1913 Webster]

WordNet (r) 3.0 (2006):

lineage
    n 1: the descendants of one individual; "his entire lineage has
         been warriors" [syn: lineage, line, line of descent,
         descent, bloodline, blood line, blood, pedigree,
         ancestry, origin, parentage, stemma, stock]
    2: the kinship relation between an individual and the
       individual's progenitors [syn: descent, line of descent,
       lineage, filiation]
    3: the number of lines in a piece of printed material [syn:
       linage, lineage]
    4: a rate of payment for written material that is measured
       according to the number of lines submitted [syn: linage,
       lineage]
    5: inherited properties shared with others of your bloodline
       [syn: ancestry, lineage, derivation, filiation]

Moby Thesaurus II by Grady Ward, 1.0:

157 Moby Thesaurus words for "lineage":
   Indian file, affiliation, aftermath, ancestry, animal kingdom,
   apparentation, array, articulation, bank, birth, blood, bloodline,
   branch, breed, brood, buzz, catena, catenation, chain,
   chain reaction, chaining, children, clan, class, coming after,
   common ancestry, concatenation, conclusion, connection,
   consanguinity, consecution, consecutiveness, consequence,
   continuation, continuity, continuum, course, cycle, deme,
   derivation, descendant, descendants, descent, direct line,
   distaff side, drone, dynasty, effect, endless belt, endless round,
   extension, extraction, family, family tree, female line, file,
   filiation, folk, following, forebears, forefathers, fruit, gamut,
   genealogy, gens, gradation, grandchildren, great-grandchildren,
   heir, heirs, hostages to fortune, house, hum, inheritors, issue,
   kids, kind, kindred, line, line of descent, little ones,
   logical sequence, male line, matriclan, monotone, nation,
   new generation, nexus, offspring, order, order of succession,
   origin, parentage, patriclan, pedigree, pendulum, people,
   periodicity, phratry, phyle, phylum, plant kingdom, plenum,
   posteriority, posterity, postposition, powder train, procession,
   progeny, progression, prolongation, queue, race, range, rank,
   recurrence, reticulation, rising generation, rotation, round,
   routine, row, run, scale, seed, sept, sequel, sequence, series,
   side, single file, sons, spear side, species, spectrum,
   spindle side, stem, stirps, stock, strain, string, subjunction,
   succession, successiveness, successor, suffixation, swath,
   sword side, thread, tier, totem, train, treasures, tribe, windrow,
   younglings, youngsters