has part has part has_part characteristic of has modifier abnormal lacrimal gland bud morphology small lacrimal gland bud decreased lacrimal gland bud size reduced size of the single bud-like invagination of the conjunctival fornix epithelium at the temporal aspect of the eye that signals lacrimal gland formation; in mouse, the primary bud arises around E13.5 and extends caudally into the surrounding neural-crest derived periocular mesenchyme at E14.5; following elongation, the bud invades the mesenchymal sac at E16.5 and begins a period of rapid growth and branching to form prospective lobular structures: the intra- and ex-orbital lobes MP:0013471 reduced lacrimal gland bud size abnormal decreased size lacrimal gland bud