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L-handle
n. an L-shaped handle assembly which may be lockable

L-handle lock
n. a cabinet lock with an L-shaped handle

labeled door
n. a door which has a fire protection certification by one of the recognized underwriting agencies

labeled exit
n. a labeled door equipped with labeled hardware that can be used for building egress

laminated padlock
n. a padlock whose case is constructed of separate plates usually riveted together

LAN-alarm web camera
n. a self-standing surveillance camera having alarm compatible for IR devices, switches and onboard website, Internet email sending capability

large format interchangeable core
n. an interchangeable core which is too large to fit into a small format interchangeable core housing

laser cut
adj. 1. a way of cutting a key so that the roots of adjacent cuts are connected by a straight-line cut; 2. a way of cutting a key so that the root of a shallow cut is widened until it intersects the included angle of an adjacent deeper cut

latch
1. n. a mechanical or magnetic door fastener which can automatically keep a door, gate, etc., closed, 2. v. engagement of a latch when a door, gate, etc. is pushed or pulled closed

latch bolt
n. a spring actuated bolt, normally with one or more beveled surfaces, which, when aligned with the strike, engages it automatically

latch guard
n. a plate or combination of interlocking pieces designed to block access to the edge of a latch when the door is shut

latch tube
n. the encasement portion of some types of lockset that contains the latch and may also contain its operating mechanism

latching speed (of a door closer)
n. the final speed of a door just prior to closing

latchset
n. a non-locking device which contains only a latch bolt, a means of operating said latch and all required trim

layout tray
n. a compartmented container used to organize cylinder parts during keying or servicing

lazy cam/tailpiece
n. a cam or tailpiece designed to remain stationary while the cylinder plug is partially rotated and/or vice-versa

leading face
n. the door face closest to the strike side of the jamb when the door is open

leaf
n. 1.One half or section of a hinge 2. One door in a set of double doors 3. One section of a multiple section door

left hand (man door)
adj. pertaining to an inward swinging door with hinges on the left side, using the outside of the door as reference

left hand reverse bevel (door)
adj. pertaining to a left handed door which swings outward

leg irons
n. -pl. a pair of ringlike fetters, connected by a short chain or straight member, designed to be locked about the ankle

levels of keying
n. pl. the divisions of a master key system into hierarchies of access, as shown in the following tables. Note: the standard key coding system has been expanded to include key symbols for systems of more than four levels of keying.

L-handle
n. an L-shaped handle assembly which may be lockable

L-handle lock
n. a cabinet lock with an L-shaped handle

labeled door
n. a door which has a fire protection certification by one of the recognized underwriting agencies

labeled exit
n. a labeled door equipped with labeled hardware that can be used for building egress

laminated padlock
n. a padlock whose case is constructed of separate plates usually riveted together

LAN-alarm web camera
n. a self-standing surveillance camera having alarm compatible for IR devices, switches and onboard website, Internet email sending capability

large format interchangeable core
n. an interchangeable core which is too large to fit into a small format interchangeable core housing

laser cut
adj. 1. a way of cutting a key so that the roots of adjacent cuts are connected by a straight-line cut; 2. a way of cutting a key so that the root of a shallow cut is widened until it intersects the included angle of an adjacent deeper cut

latch
1. n. a mechanical or magnetic door fastener which can automatically keep a door, gate, etc., closed, 2. v. engagement of a latch when a door, gate, etc. is pushed or pulled closed

latch bolt
n. a spring actuated bolt, normally with one or more beveled surfaces, which, when aligned with the strike, engages it automatically

latch guard
n. a plate or combination of interlocking pieces designed to block access to the edge of a latch when the door is shut

latch tube
n. the encasement portion of some types of lockset that contains the latch and may also contain its operating mechanism

latching speed (of a door closer)
n. the final speed of a door just prior to closing

latchset
n. a non-locking device which contains only a latch bolt, a means of operating said latch and all required trim

layout tray
n. a compartmented container used to organize cylinder parts during keying or servicing

lazy cam/tailpiece
n. a cam or tailpiece designed to remain stationary while the cylinder plug is partially rotated and/or vice-versa

leading face
n. the door face closest to the strike side of the jamb when the door is open

leaf
n. 1.One half or section of a hinge 2. One door in a set of double doors 3. One section of a multiple section door

left hand (man door)
adj. pertaining to an inward swinging door with hinges on the left side, using the outside of the door as reference

left hand reverse bevel (door)
adj. pertaining to a left handed door which swings outward

leg irons
n. -pl. a pair of ringlike fetters, connected by a short chain or straight member, designed to be locked about the ankle

levels of keying
n. pl. the divisions of a master key system into hierarchies of access, as shown in the following tables. Note: the standard key coding system has been expanded to include key symbols for systems of more than four levels of keying.