Acrosomal cap
acrosomal cap
acrosomal cap n.
a caplike structure at the anterior end of a spermatozoon that produces enzymes aiding in egg penetration. also called acrosome, head cap.
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- Acrosomal granule
acrosomal granule acrosomal granule n. a large granule that is formed by the coalescing of proacrosomal granules within the acrosomal vesicle and adheres to the nuclear envelope of a developing spermatozoon.
- Acrosomal vesicle
acrosomal vesicle acrosomal vesicle n. a vesicle derived from the golgi apparatus during spermiogenesis; its membrane adheres to the nuclear envelope of the sperm and, together the the acrosomal granule within the vesicle, spreads in a thin layer over the pole of the nucleus to form the acrosomal cap.
- Acrospire
the first sprout appearing in the germination of grain; the developed plumule of the seed. historical examples by about the eighth day of flooring the acrospire should be about three-quarters up the corn. encyclopaedia britannica, 11th edition, volume 17, slice 4 various the malting, however, is complete before the acrospire becomes a leaf. a dictionary […]
- Acrospore
a borne at the tip of a sporoph-r-, as a basidiospore.
- Across
from one side to the other of: a bridge across a river. on or to the other side of; beyond: across the sea. into contact with; into the presence of, usually by accident: to come across an old friend; to run across a first edition of byron. crosswise of or transversely to the length of […]