noun
also rhyn·cho·coele ˈriŋkōˌsēl ; or rhyn·cho·coelom or rhyn·cho·coelome |riŋkō+
( -s )
Etymology: rhynch- + -coel, -coele or coelom, coelome
: a tubular cavity that holds the introverted proboscis of a nemertean worm and is sometimes considered homologous with the coelom