The form gruther is a cross reference to the following entry:
[vcd]
gruere,
gru,
gruther (l. gruyer?)
s.
1orn.falc.zool.falcon, hawk (for hunting cranes):
(
MS: s.xiii1
)
gruarius: (D) gruer
243
(
MS: s.xiii1
)
gruarius: gruere
ii 98.65
(
MS: s.xivin
)
gruarius, id est gruther
(l. gruyer?)
11 n.33
gruage
grue#1
gruther