Nounditch; drain; gutter; trench · gap (between cutting guides)

Nounoceanic trench; deep-sea trench; deep

Numeric10^32; hundred nonillion

Nounfurrow ridges

Noungutter; ditch

Nounrift valley

Nounlarge ditch

Nounsulcus; groove in the surface of the brain

Nounepidermal depression; skin depression

Nounsubterranean drain; culvert; conduit

Nounmammary slit (in whales, dolphins and porpoises) · cleavage (between breasts)

Nounfins (of a fountain pen feed); comb feed

Nounligature mark; constriction mark; strangulation groove

Noundrainage ditch; canal

Noundrainage; gutter; ditch

Nounmultipurpose underground utility conduit

NounU-shaped gutter

Noungingival sulcus

Nounclearance groove; under cut

Nounlateral sulcus (brain structure); Sylvian fissure; lateral fissure

Nounnasolabial sulcus; nasolabial groove; nasolabial fold

NounL-shaped gutter; L-shaped drain

Nounkeyway

Nounsnow drainage gutter

Nounwaste of money

NounJapan Trench

Noungroove in the body of wooden plane which holds the blade

Nounrecord groove

NounMariana Trench (deepest part of the ocean, near the Mariana Islands)