bi·lat·er·al / bīˈlatərəl/ • adj. having or relating to two sides; affecting both sides: bilateral hearing is essential for sound location. ∎  involving two parties, usually countries: the recently concluded bilateral agreements with Japan. DERIVATIVES: bi·lat·er·al·ly adv.

bilateral (by-lat-er-ăl) adj. (in anatomy) relating to or affecting both sides of the body or of a tissue or organ or both of a pair of organs.

bilateral •apparel, barrel, carol, Carole, carrel, Carroll, Darrell, Darryl, Farrell •gambrel • spandrel •astral, plastral •cracker-barrel •Errol, feral •petrel, petrol •spectral •central, epicentral, ventral •ancestral, kestrel, orchestral •dextral • Sacheverell • mayoral •sacral • wastrel • cerebral •anhedral, cathedral, dihedral, tetrahedral •hypaethral (US hypethral), urethral •squirrel, Tyrol, Wirral •timbrel, whimbrel •minstrel • arbitral • sinistral • integral •triumviral •spiral, viral •amoral, Balmoral, coral, immoral, laurel, moral, quarrel, sorel, sorrel •cockerel, Cockerell •dotterel • rostral •aboral, aural, choral, floral, goral, oral •austral, claustral •scoundrel • cloistral • neutral • figural •augural •demurral, Durrell •mongrel • sepulchral • lustral •spheral • retiral •crural, jural, mural, neural, plural, rural •illiberal, liberal •natural • federal • peripheral •doggerel • mackerel • pickerel •bicameral, unicameral •admiral •ephemeral, femoral •humeral, numeral •general • mineral • funeral •spatio-temporal, temporal •corporal • tesseral • visceral •bilateral, collateral, equilateral, lateral, multilateral, quadrilateral, trilateral, unilateral •pastoral •electoral, pectoral, prefectoral, protectoral •clitoral, literal, littoral, presbyteral •dipteral, peripteral •doctoral • several • behavioural •conferral, deferral, referral, transferral