capillary

¹cap·il·lary

adj
\ˈkap-ə-ˌler-ē, British usually kə-ˈpil-ə-rē\

Definition of CAPILLARY

1

a : resembling a hair especially in slender elongated form b : having a very small bore <a capillary tube>

2

: involving, held by, or resulting from surface tension

3

: of or relating to capillaries or capillarity