So yesterday me Missus asked me to make a spice rack that can mount on the inside of the pots and pans cabinet door. I took some measurements, and lay it out in my head as I’m trying to sleep. Pretty basic, back piece, two sides, bottom, and a bar across the front the hold things in. I have never made/used a rabbet before and decide this will be a good project to learn on. I’m using 1/4 Baltic Birch. I get the 4 main pieces cut, and rabbeted. Everything fits like a dream, I’m pretty satisfied with myself. Only thing left to do before glue-up is to cut the dado/groove in the front of the 2 side pieces for the bar to go across the front and keep things from falling out. YUP, you guessed it, I got discombobulated and cut the dado/groove in the back of the 2 side pieces. I had already cleaned up and put away the router table (which I had gotten dialed in perfectly for the rabbets), so I called it a day. I must be getting mature, or at least older, cause I didn’t even throw anything . I will cut 1/4 inch off the back of the 2 sides, and rabbet the back again, and this time try to make sure I cut the dados/grooves in the FRONT of the pieces. So as to learn SOMETHING from this experience what is the proper name for the cut in the front of the 2 side pieces for the front bar? A dado goes across the grain, a groove goes with the grain, plywood is glued up perpendicular to each other, so is either name correct? Curious minds want to know (it may be a WEAK mind, but it is curious).