●In Erinaceids & Mushrooms:
A small
, of the family Erinaceidae or
Erinaceinae (spiny
, the latter
by their
back and often by the
of
into a
when attacked.)
●In American English & Erinaceids:
Any of several
, such as the
, that are
to the hedgehog.
●In Military, World War II & Mushrooms:
A
mortar-type of
from World War II that
into the water to create a
of
to
submarines.
●In Erinaceids & Mushrooms:
●In Curves & Differential geometry:
A type of
; see Hedgehog (geometry).