part of ends during starts during death anatomical cluster olfactory epithelium glomerular cluster A cluster of lobe-like projections of glomeruli within the glomerular layer of the ofactory bulb, each cluster being referred to by their directionality (e.g. medial vs. lateral, and/or relative size, e.g. small vs. intermediate). Olfactory receptor neuron axons (ORNs, yellow) incoming from the olfactory nerve (ON) form distinct medial (MC), intermediate (IC), and lateral (LC) clusters in the glomerular layer. xenopus_anatomy XAO:0006053 NF stage 23