{ Sub`ter*ra"ne*an (?), Sub`ter*ra"ne*ous (?), } a. [L. subterraneus;
sub under + terra earth. See Terrace.] Being or lying under the surface
of the earth; situated within the earth, or under ground; as,
subterranean springs; a subterraneous passage. -- Sub`ter*ra"ne*ous*ly,
adv.
Sub`ter*ran"i*ty (?), n. A place under ground; a subterrany. [Obs.] Sir
T. Browne.
Sub"ter*ra*ny (?), a. Subterranean. [Obs.] Bacon. -- n. A subterranean
place. [Obs.]
Sub`ter*rene" (?), a. [L. subterrenus, equiv. to subterraneus.]
Subterraneous. [Obs.]
Sub`ter*res"tri*al (?), a. Subterranean.
Sub`tha*lam"ic (?), a. (Anat.) Situated under the optic thalamus.
Sub"tile (?), a. [L. subtilis. See Subtile.] 1. Thin; not dense or
gross; rare; as, subtile air; subtile vapor; a subtile medium.
2. Delicately constituted or constructed; nice; fine; delicate;
tenuous; finely woven. "A sotil [subtile] twine's thread." Chaucer.
More subtile web Arachne can not spin.
Spenser.