Intra-: within: between.
Intra-alar bristles: in Diptera; a row of two or three between the supra-alar and dorso-central groups.
Intracellular: occurring within the cell or in a cell.
Infra-humeral bristles: in Diptera calyptrata; occur immediately in front of the thoracic suture, between the humeral callus and the presutural depression.
Infra-ocular: situated within the eye, actually or apparently.
Intra-pulmonary: that method of respiration which does not involve movements of the outer body wall and is confined to the respiratory organs.
Intrauterine: applied to development, when the young hatch within the vagina of the mother.
Intricate: irregular: confused; applied to markings and sculpture.
Intromittent: used for throwing within.
Intromittent organ: the penis; q.v.