bivium Definition

interambulacrum, tube foot, echinoderm, brittle star, pair, trijugate, spatangoid, basket star, heart urchin, bipinnaria, ambulacrum, actinost, geminy, heteracanth, geminous, epistome, couplement, epipodium, multijugate, phoronid, tubiporite, urochordate, epipodite, epimeron, spirifer, trochosphere, cephalochordate, combtooth blenny, proostracum, semita, chelicerate, endosternite, coelomate, astrophyton, endopleurite, aptychus, pectinibranchiate, fasciole, homacanth, bilateral symmetry, propodite, basipodite, sea pen, brachiolaria, ischiopodite, deltidium, hippocrepian, cephalomere, euryalida, trochite, ectoprocta, tweedledum and tweedledee, inferobranchian, tetraxile, sea star, sea lily, paludina, auriform, rime riche, auriculated, cephalochordata, tergeminate, anaptychus, microgamete, entrochite, sea lemon, didymous, endostyle, paramere, larvacean, interosculant, fissurella, arthromere, binervate, echinodermata, entoproct, ischiocerite, cyclobranchiate, pedicellaria, anthozoan, endognath, mixogamous, scaphopoda, melanian, gnathopod, spheromere, tubulipore, neritid, heterogangliate, siphuncle, hemerythrin, bubble shell, ectoproct, zoaea, acoelomate, hippurite, butterfly fish, interepimeral, metapterygium, ichthyopterygium,