head cap


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ac·ro·some

(ak'rō-sōm),
A caplike organelle or saccule derived from Golgi elements that surround the anterior two thirds of the nucleus of a sperm. Enzymes contained within this structure probably facilitate the sperm's penetration of the zona pellucida of the oocyte.
Synonym(s): acrosomal cap, head cap
[acro- + G. soma, body]

head cap

(hed kap)
A device fitted closely to the skull; used for fixed anchorage in external traction.
References in periodicals archive ?
The foundry, located in Hutchins, Texas, constructed what other companies had not been able to do-high-quality head caps for the MK 22, MOD 4 rocket motor.
Limited Tenders are invited for 1)socket head cap screw qty: 60 no 2)eye for dumping cylinder qty: 10 no 3)stud for dumping cylinder qty: 10 no 4)socket head cap screw item 2 qty: 50 no 5)socket head screw cap qty: 50 no 6)stud for 900t press item no-1 qty: 50 no 7)stud for 900t press item no-2 qty: 50 no 8)stud for 900t press item no-3 qty: 50 no 9)stud for 900t press item no-4 qty: 50 no 10)stud for 9000t press qty: 50 no
Limited Tenders are invited for 1)screw hex socket head cap p- 12.9 m6x25 as per spec aa7123123 rev 07 (zinc plated & passivated 8-12 microns) qty: 210 kg 2)screw hex socket hd.