Defn: Having no capsule.
ACARDIAC
A*car"di*ac, a. Etym: [Gr.
Defn: Without a heart; as, an acardiac fetus.
ACARIDAN
A*car"i*dan, n. Etym: [See Acarus.] (Zoöl.)
Defn: One of a group of arachnids, including the mites and ticks.
ACARINA
Ac`a*ri"na, n. pl. Etym: [NL., from Gr. (Zoöl.)
Defn: The group of Arachnida which includes the mites and ticks. Many species are parasitic, and cause diseases like the itch and mange.
ACARINE
Ac"a*rine, a. (Med.)
Defn: Of or caused by acari or mites; as, acarine diseases.
ACAROID
Ac"a*roid, a. Etym: [NL., acarus a mite + -oid.] (Zoöl.)