Term: trepan: a drill for cutting circular holes around a center
Broader: drill: a tool with a sharp point and cutting edges for making holes in hard materials (usually rotating rapidly or by repeated blows) | Unrelated: spice rack: a rack for displaying containers filled with spices
Broader: drill: a tool with a sharp point and cutting edges for making holes in hard materials (usually rotating rapidly or by repeated blows) | Unrelated: yellow-crowned night heron: North American night heron
Broader: drill: a tool with a sharp point and cutting edges for making holes in hard materials (usually rotating rapidly or by repeated blows) | Unrelated: fresh water: water that is not salty
Broader: drill: a tool with a sharp point and cutting edges for making holes in hard materials (usually rotating rapidly or by repeated blows) | Unrelated: left coronary artery: arises from the left aortic sinus; supplies the left side of the heart
Broader: drill: a tool with a sharp point and cutting edges for making holes in hard materials (usually rotating rapidly or by repeated blows) | Unrelated: charge-exchange accelerator: an accelerator in which high-energy ions escape from plasma following charge exchange
Broader: drill: a tool with a sharp point and cutting edges for making holes in hard materials (usually rotating rapidly or by repeated blows) | Unrelated: ibero-mesornis: sparrow-sized fossil bird of the Cretaceous period having a vestigial tail; found in Spain; considered possibly the third most primitive of all birds
Broader: drill: a tool with a sharp point and cutting edges for making holes in hard materials (usually rotating rapidly or by repeated blows) | Unrelated: change of magnitude: the act of changing the amount or size of something
Broader: drill: a tool with a sharp point and cutting edges for making holes in hard materials (usually rotating rapidly or by repeated blows) | Unrelated: confervoid algae: algae resembling confervae especially in having branching filaments
Broader: drill: a tool with a sharp point and cutting edges for making holes in hard materials (usually rotating rapidly or by repeated blows) | Unrelated: jeer: showing your contempt by derision
Broader: drill: a tool with a sharp point and cutting edges for making holes in hard materials (usually rotating rapidly or by repeated blows) | Unrelated: stirrup: support consisting of metal loops into which rider's feet go