lip vs sluice box

lip

noun
  • The projecting rim of an open container; a short open spout. 

  • Backtalk; verbal impertinence. 

  • One of the two opposite divisions of a labiate corolla. 

  • Either of the two fleshy protrusions around the opening of the mouth. 

  • The sharp cutting edge on the end of an auger. 

  • A part of the body that resembles a lip, such as the edge of a wound or the labia. 

  • One of the edges of the aperture of a univalve shell. 

  • The edge of a high spot of land. 

  • The distinctive petal of the Orchis family. 

  • Embouchure: the condition or strength of a wind instrumentalist's lips. 

verb
  • To change the sound of (a musical note played on a wind instrument) by moving or tensing the lips. 

  • To form the rim, edge or margin of something. 

  • To simulate speech by moving the lips without making any sound; to mouth. 

  • (of something inanimate) To touch lightly. 

  • To touch or grasp with the lips; to kiss; to lap the lips against (something). 

  • To make a golf ball hit the lip of the cup, without dropping in. 

  • To utter verbally. 

  • To rise or flow up to or over the edge of something. 

  • To wash against a surface, lap. 

sluice box

noun
  • A box with riffles along the bottom, used to trap heavier gold particles as water washes them and the other material along the box. 

How often have the words lip and sluice box occurred in a corpus of books? (source: Google Ngram Viewer )