Defn: A genus of bivalve mollusks, including the common long, or soft-shelled, clam.

MYALGIA
My*al"gi*a, n. Etym: [NL., fr. Gr. (Med.)

Defn: Pain in the muscles; muscular rheumatism or neuralgia.

MYALL WOOD
My*all" wood`. (Bot.)

Defn: A durable, fragrant, and dark-colored Australian wood, used by the natives for spears. It is obtained from the small tree Acacia homolophylla.

MYARIA
My*a"ri*a, n. pl. Etym: [NL.] (Zoöl.)

Defn: A division of bivalve mollusks of which the common clam (Mya) is the type.

MYCELIUM
My*ce"li*um, n. Etym: [NL., fr. Gr. my`khs a mushroom.] (Bot.)

Defn: The white threads or filamentous growth from which a mushroom or fungus is developed; the so-called mushroom spawn. — My*ce"li*al, a.

MYCELOID
Myc"e*loid, a. Etym: [Mycelium + -oid.] (Bot.)